🎉 Initial commit

2026-08-19 20:59:23 +02:00
commit 4f24713617
11 changed files with 875 additions and 0 deletions
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+.git
+.github
+.venv
+__pycache__
+*.pyc
+.pytest_cache
+.vscode
+.env
+README.md
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+# Created by https://www.toptal.com/developers/gitignore/api/visualstudiocode,python
+# Edit at https://www.toptal.com/developers/gitignore?templates=visualstudiocode,python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/visualstudiocode,python
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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+
+        {
+            "name": "Python Debugger: FastAPI",
+            "type": "debugpy",
+            "request": "launch",
+            "module": "uvicorn",
+            "args": [
+                "app.main:app",
+                "--reload"
+            ],
+            "jinja": true
+        }
+    ]
+}
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+FROM python:3.12-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    CONFIG_PATH=/app/config.json
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app ./app
+COPY config.json ./config.json
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
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+# Bo hemma-avi med Swish-QR
+
+En enkel Docker-app som:
+
+- läser kostnadsposter från `config.json`
+- visar underlaget på en webbsida
+- låter användaren mata in månadens nettoinkomst
+- räknar fram `min(kostnadsandel, nettoinkomst * income_ratio, eventuell max_amount)`
+- genererar en Swish-QR-kod med förifyllt belopp och meddelande
+
+## Starta
+
+```bash
+docker compose up --build
+```
+
+Öppna sedan:
+
+```text
+http://localhost:8000
+```
+
+## Konfiguration
+
+Exempel:
+
+```json
+{
+  "title": "Bo hemma-avi",
+  "currency": "SEK",
+  "swish": {
+    "payee": "46701234567",
+    "message_prefix": "Bohemma",
+    "lock_mask": 0
+  },
+  "payment": {
+    "income_ratio": 0.30,
+    "max_amount": null,
+    "round_to": 1
+  },
+  "items": [
+    {
+      "post": "hushållsel",
+      "amount": 1000,
+      "period": "month",
+      "ratio": 0.2,
+      "comment": "20 % av uppskattad månadskostnad"
+    },
+    {
+      "post": "hemförsäkring",
+      "amount": 5000,
+      "period": "year",
+      "ratio": 0.2,
+      "comment": "20 % av årskostnad, omräknad till månad"
+    }
+  ]
+}
+```
+
+### Fält
+
+| Fält | Betydelse |
+|---|---|
+| `swish.payee` | Swishnummer, t.ex. `46701234567` |
+| `swish.message_prefix` | Prefix i meddelandet, appen lägger till aktuell period, t.ex. `Bohemma 2026-07` |
+| `swish.lock_mask` | `0` låser mottagare, belopp och meddelande |
+| `payment.income_ratio` | Andel av nettoinkomst som är tak, t.ex. `0.30` |
+| `payment.max_amount` | Extra absolut maxbelopp, eller `null` |
+| `payment.round_to` | Avrundning uppåt, t.ex. `1`, `10`, `50` eller `100` |
+| `items[].amount` | Kostnad, per månad eller år beroende på `period` |
+| `items[].period` | `month` eller `year` |
+| `items[].ratio` | Andel dottern ska bära, t.ex. `0.2` eller `1` |
+
+## Viktigt
+
+Appen genomför ingen betalning. QR-koden förifyller betalningen i Swish, men betalaren måste själv granska och godkänna betalningen.
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+from __future__ import annotations
+
+import base64
+import io
+import json
+import math
+import os
+from datetime import date
+from pathlib import Path
+from typing import Literal
+from urllib.parse import quote
+
+import qrcode
+from fastapi import FastAPI, Query, Request
+from fastapi.responses import HTMLResponse, PlainTextResponse
+from fastapi.staticfiles import StaticFiles
+from fastapi.templating import Jinja2Templates
+from pydantic import BaseModel, Field, field_validator, model_validator
+
+import uvicorn
+
+
+class CostItem(BaseModel):
+    post: str = Field(min_length=1)
+    amount: float = Field(ge=0)
+    period: Literal["month", "year"] = "month"
+    ratio: float = Field(ge=0, le=1)
+    comment: str | None = None
+
+    @property
+    def monthly_amount(self) -> float:
+        return self.amount / 12 if self.period == "year" else self.amount
+
+    @property
+    def monthly_share(self) -> float:
+        return self.monthly_amount * self.ratio
+
+
+class SwishConfig(BaseModel):
+    payee: str = Field(min_length=8, description="Swishnummer, helst med landskod utan +, t.ex. 46701234567")
+    message_prefix: str = "Bohemma"
+    lock_mask: int = Field(default=0, ge=0, description="0 låser mottagare, belopp och meddelande i Swish-QR-formatet.")
+
+    @field_validator("payee")
+    @classmethod
+    def normalize_payee(cls, value: str) -> str:
+        return value.replace("+", "").replace(" ", "").replace("-", "")
+
+
+class PaymentConfig(BaseModel):
+    income_ratio: float = Field(default=0.30, ge=0, le=1)
+    max_amount: float | None = Field(default=None, ge=0)
+    round_to: float = Field(default=1.0, ge=0.0)
+
+
+class AppConfig(BaseModel):
+    title: str = "Bo hemma-avi"
+    currency: str = "SEK"
+    swish: SwishConfig
+    payment: PaymentConfig = PaymentConfig()
+    items: list[CostItem]
+
+    @model_validator(mode="after")
+    def ensure_items(self) -> "AppConfig":
+        if not self.items:
+            raise ValueError("config.json måste innehålla minst en kostnadspost i items.")
+        return self
+
+
+app = FastAPI(title="Bo hemma-avi")
+app.mount("/static", StaticFiles(directory="app/static"), name="static")
+templates = Jinja2Templates(directory="app/templates")
+
+
+def config_path() -> Path:
+    #return Path(os.getenv("CONFIG_PATH", "/app/config.json"))
+    return Path(os.getenv("CONFIG_PATH", "config.json"))
+
+
+def load_config() -> AppConfig:
+    path = config_path()
+    with path.open("r", encoding="utf-8") as f:
+        data = json.load(f)
+    return AppConfig.model_validate(data)
+
+
+def money(value: float) -> str:
+    rounded = round(value, 2)
+    if rounded == int(rounded):
+        return f"{int(rounded):,}".replace(",", " ")
+    return f"{rounded:,.2f}".replace(",", " ").replace(".", ",")
+
+
+def swish_amount(value: float) -> str:
+    return f"{value:.2f}"#.replace(".", ",")
+
+
+def round_to(value: float, round_to: float) -> float:
+    return float(math.ceil(value / round_to) * round_to)
+
+
+def current_period() -> str:
+    today = date.today()
+    return f"{today.year}-{today.month:02d}"
+
+
+def build_swish_payload(payee: str, amount: float, message: str, lock_mask: int) -> str:
+    # Swish QR text payload. Meddelandet URL-kodas, mellanslag blir %20.
+    return f"C{payee};{swish_amount(amount)};{quote(message, safe=' ')};{lock_mask}"
+
+
+def qr_data_uri(payload: str) -> str:
+    qr = qrcode.QRCode(
+        version=None,
+        error_correction=qrcode.ERROR_CORRECT_M,
+        box_size=10,
+        border=3,
+    )
+    qr.add_data(payload)
+    qr.make(fit=True)
+    image = qr.make_image(fill_color="black", back_color="white")
+    buffer = io.BytesIO()
+    image.save(buffer, "PNG")
+    encoded = base64.b64encode(buffer.getvalue()).decode("ascii")
+    return f"data:image/png;base64,{encoded}"
+
+
+@app.get("/", response_class=HTMLResponse)
+def index(request: Request, nettoinkomst: float | None = Query(default=None, ge=0)):
+    cfg = load_config()
+
+    rows = []
+    total_monthly_share = 0.0
+    for item in cfg.items:
+        row = {
+            "post": item.post,
+            "amount": item.amount,
+            "period": item.period,
+            "ratio": item.ratio,
+            "monthly_amount": item.monthly_amount,
+            "monthly_share": item.monthly_share,
+            "comment": item.comment,
+        }
+        rows.append(row)
+        total_monthly_share += item.monthly_share
+
+    calculation = None
+    if nettoinkomst is not None:
+        income_cap = nettoinkomst * cfg.payment.income_ratio
+        candidates = [total_monthly_share, income_cap]
+        if cfg.payment.max_amount is not None:
+            candidates.append(cfg.payment.max_amount)
+        amount = round_to(min(candidates), cfg.payment.round_to)
+        message = f"{cfg.swish.message_prefix} {current_period()}"
+        payload = build_swish_payload(cfg.swish.payee, amount, message, cfg.swish.lock_mask)
+        calculation = {
+            "nettoinkomst": nettoinkomst,
+            "income_ratio": cfg.payment.income_ratio,
+            "income_cap": income_cap,
+            "amount": amount,
+            "message": message,
+            "payload": payload,
+            "qr": qr_data_uri(payload),
+        }
+
+    return templates.TemplateResponse(
+        request=request,
+        name="index.html",
+        context={
+            "cfg": cfg,
+            "rows": rows,
+            "total_monthly_share": total_monthly_share,
+            "calculation": calculation,
+            "money": money,
+        },
+    )
+
+
+@app.get("/health", response_class=PlainTextResponse)
+def health() -> str:
+    return "ok"
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+:root {
+  color-scheme: light;
+  --bg: #f6f7f9;
+  --card: #ffffff;
+  --text: #17202a;
+  --muted: #657080;
+  --line: #dde3ea;
+  --accent: #0d6efd;
+  --accent-dark: #084fb4;
+}
+
+* { box-sizing: border-box; }
+
+body {
+  margin: 0;
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  background: var(--bg);
+  color: var(--text);
+}
+
+.page {
+  max-width: 1100px;
+  margin: 0 auto;
+  padding: 32px 18px 64px;
+}
+
+.card {
+  background: var(--card);
+  border: 1px solid var(--line);
+  border-radius: 18px;
+  padding: 24px;
+  margin: 18px 0;
+  box-shadow: 0 10px 30px rgba(23, 32, 42, 0.06);
+}
+
+.hero {
+  background: linear-gradient(135deg, #ffffff, #edf4ff);
+}
+
+.eyebrow {
+  text-transform: uppercase;
+  letter-spacing: 0.12em;
+  color: var(--accent);
+  font-weight: 700;
+  margin: 0 0 8px;
+}
+
+h1, h2, h3 { margin-top: 0; }
+
+.lead {
+  color: var(--muted);
+  max-width: 760px;
+  font-size: 1.08rem;
+}
+
+.table-wrap { overflow-x: auto; }
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+  min-width: 850px;
+}
+
+th, td {
+  padding: 12px 10px;
+  border-bottom: 1px solid var(--line);
+  text-align: left;
+  vertical-align: top;
+}
+
+th {
+  font-size: 0.88rem;
+  color: var(--muted);
+  font-weight: 700;
+}
+
+tfoot td {
+  font-weight: 800;
+  background: #f9fbff;
+}
+
+.num { text-align: right; white-space: nowrap; }
+.strong { font-weight: 800; }
+
+.form label {
+  display: block;
+  font-weight: 700;
+  margin-bottom: 8px;
+}
+
+.input-row {
+  display: flex;
+  gap: 12px;
+  flex-wrap: wrap;
+}
+
+input {
+  flex: 1 1 240px;
+  font: inherit;
+  padding: 13px 14px;
+  border: 1px solid var(--line);
+  border-radius: 12px;
+}
+
+button {
+  border: 0;
+  border-radius: 12px;
+  padding: 13px 18px;
+  font: inherit;
+  font-weight: 800;
+  color: white;
+  background: var(--accent);
+  cursor: pointer;
+}
+
+button:hover { background: var(--accent-dark); }
+
+.result {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
+  gap: 14px;
+  margin-top: 22px;
+}
+
+.result > div {
+  border: 1px solid var(--line);
+  border-radius: 14px;
+  padding: 16px;
+  background: #fbfcff;
+}
+
+.label {
+  color: var(--muted);
+  margin: 0 0 6px;
+  font-size: 0.92rem;
+}
+
+.big {
+  margin: 0;
+  font-weight: 850;
+  font-size: 1.45rem;
+}
+
+.accent { color: var(--accent); }
+
+.qr-block {
+  display: flex;
+  gap: 24px;
+  flex-wrap: wrap;
+  align-items: center;
+  margin-top: 24px;
+  padding: 18px;
+  border: 1px solid var(--line);
+  border-radius: 16px;
+}
+
+.qr-block img {
+  width: 230px;
+  height: 230px;
+  image-rendering: crisp-edges;
+}
+
+code {
+  display: block;
+  margin-top: 10px;
+  padding: 12px;
+  background: #f1f3f6;
+  border-radius: 10px;
+  overflow-x: auto;
+}
@@ -0,0 +1,112 @@
+<!doctype html>
+<html lang="sv">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>{{ cfg.title }}</title>
+  <link rel="stylesheet" href="{{ url_for('static', path='/style.css') }}">
+</head>
+<body>
+  <main class="page">
+    <section class="hero card">
+      <div>
+        <p class="eyebrow">Månadsavi</p>
+        <h1>{{ cfg.title }}</h1>
+        <p class="lead">
+          Mata in månadens nettoinkomst. Sidan räknar ut minsta belopp av
+          beräknad kostnadsandel och {{ (cfg.payment.income_ratio * 100) | round | int }} % av nettoinkomsten.
+        </p>
+      </div>
+    </section>
+
+    <section class="card">
+      <h2>Underlag från config.json</h2>
+      <div class="table-wrap">
+        <table>
+          <thead>
+            <tr>
+              <th>Post</th>
+              <th>Belopp</th>
+              <th>Period</th>
+              <th>Andel</th>
+              <th>Månadskostnad</th>
+              <th>Din andel/mån</th>
+              <th>Kommentar</th>
+            </tr>
+          </thead>
+          <tbody>
+            {% for row in rows %}
+              <tr>
+                <td>{{ row.post }}</td>
+                <td class="num">{{ money(row.amount) }} {{ cfg.currency }}</td>
+                <td>{{ "år" if row.period == "year" else "månad" }}</td>
+                <td class="num">{{ (row.ratio * 100) | round(1) }} %</td>
+                <td class="num">{{ money(row.monthly_amount) }} {{ cfg.currency }}</td>
+                <td class="num strong">{{ money(row.monthly_share) }} {{ cfg.currency }}</td>
+                <td>{{ row.comment or "" }}</td>
+              </tr>
+            {% endfor %}
+          </tbody>
+          <tfoot>
+            <tr>
+              <td colspan="5">Beräknad kostnadsandel per månad</td>
+              <td class="num strong">{{ money(total_monthly_share) }} {{ cfg.currency }}</td>
+              <td></td>
+            </tr>
+          </tfoot>
+        </table>
+      </div>
+    </section>
+
+    <section class="card">
+      <h2>Beräkna månadens Swish</h2>
+      <form method="get" class="form">
+        <label for="nettoinkomst">Månadens nettoinkomst</label>
+        <div class="input-row">
+          <input
+            id="nettoinkomst"
+            name="nettoinkomst"
+            type="number"
+            min="0"
+            step="1"
+            placeholder="Ex. 12000"
+            value="{{ calculation.nettoinkomst | int if calculation else '' }}"
+            required>
+          <button type="submit">Skapa QR-kod</button>
+        </div>
+      </form>
+
+      {% if calculation %}
+        <div class="result">
+          <div>
+            <p class="label">Beräknad kostnadsandel</p>
+            <p class="big">{{ money(total_monthly_share) }} {{ cfg.currency }}</p>
+          </div>
+          <div>
+            <p class="label">Inkomsttak</p>
+            <p class="big">{{ money(calculation.income_cap) }} {{ cfg.currency }}</p>
+          </div>
+          <div>
+            <p class="label">Att betala</p>
+            <p class="big accent">{{ money(calculation.amount) }} {{ cfg.currency }}</p>
+          </div>
+        </div>
+
+        <div class="qr-block">
+          <img src="{{ calculation.qr }}" alt="Swish QR-kod">
+          <div>
+            <h3>Swish</h3>
+            <p><strong>Mottagare:</strong> {{ cfg.swish.payee }}</p>
+            <p><strong>Meddelande:</strong> {{ calculation.message }}</p>
+            <p><strong>Belopp:</strong> {{ money(calculation.amount) }} {{ cfg.currency }}</p>
+            <details>
+              <summary>Visa QR-innehåll</summary>
+              <code>{{ calculation.payload }}</code>
+            </details>
+          </div>
+        </div>
+      {% endif %}
+    </section>
+  </main>
+</body>
+</html>
@@ -0,0 +1,79 @@
+{
+  "title": "Bo hemma-avi",
+  "currency": "SEK",
+  "swish": {
+    "payee": "0706627248",
+    "message_prefix": "Bohemma",
+    "lock_mask": 0
+  },
+  "payment": {
+    "income_ratio": 0.30,
+    "max_amount": null,
+    "round_to": 0.1
+  },
+  "items": [
+    {
+      "post": "Mat, exkl lunch",
+      "amount": 14000,
+      "period": "month",
+      "ratio": 0.15,
+      "comment": "20 % av månadskostnad"
+    },
+    {
+      "post": "Bredband",
+      "amount": 1000,
+      "period": "year",
+      "ratio": 0.25,
+      "comment": "25 % av årskostnad, omräknad till månad"
+    },
+    {
+      "post": "Hushållsel",
+      "amount": 5000,
+      "period": "year",
+      "ratio": 0.2,
+      "comment": "20 % av årskostnad, omräknad till månad"
+    },
+    {
+      "post": "Elnätsavgift",
+      "amount": 5000,
+      "period": "year",
+      "ratio": 0.2,
+      "comment": "20 % av årskostnad, omräknad till månad"
+    },
+    {
+      "post": "VA & sophantering",
+      "amount": 4000,
+      "period": "year",
+      "ratio": 0.20,
+      "comment": "25 % av årskostnad, omräknad till månad"
+    },
+    {
+      "post": "Hemförsäkring",
+      "amount": 5000,
+      "period": "year",
+      "ratio": 0.2,
+      "comment": "20 % av årskostnad, omräknad till månad"
+    },
+    {
+      "post": "Mobilabonnemang",
+      "amount": 149,
+      "period": "month",
+      "ratio": 1,
+      "comment": "100 % av din egen kostnad"
+    },
+    {
+      "post": "Streamingtjänster",
+      "amount": 500,
+      "period": "month",
+      "ratio": 0.25,
+      "comment": "25 % av månadskostnad"
+    },
+    {
+      "post": "Hemutrustning/slitage",
+      "amount": 500,
+      "period": "month",
+      "ratio": 1,
+      "comment": "100 % av beräknad månadskostnad"
+    }
+  ]
+}
@@ -0,0 +1,11 @@
+services:
+  bohemma-swish:
+    build: .
+    container_name: bohemma-swish
+    ports:
+      - "8000:8000"
+    environment:
+      CONFIG_PATH: /app/config.json
+    volumes:
+      - ./config.json:/app/config.json:ro
+    restart: unless-stopped
@@ -0,0 +1,5 @@
+fastapi>=0.111,<1.0
+uvicorn[standard]>=0.30,<1.0
+jinja2>=3.1,<4.0
+qrcode[pil]>=7.4,<8.0
+pydantic>=2.7,<3.0