chore: consolidate to single Docker container

Replace two-container setup (separate backend + nginx frontend) with a
single image that runs both via supervisord:

- New Dockerfile: Node stage builds React, Python+nginx stage is the runtime
- supervisord.conf: manages uvicorn (api_server.py) + nginx as sibling procs
- nginx.conf: proxy_pass updated to localhost:8000 (same container)
- docker-compose.yml: simplified to one service on port 80

Deploy:
  docker-compose up -d        # or
  docker build -t flight-radar . && docker run -p 80:80 flight-radar

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

flight-comparator/Dockerfile

@@ -0,0 +1,54 @@
+# ── Stage 1: Build React frontend ─────────────────────────────────────────
+FROM node:20-alpine AS frontend-builder
+
+WORKDIR /app
+COPY frontend/package*.json ./
+RUN npm ci
+COPY frontend/ .
+RUN npm run build
+
+# ── Stage 2: Single runtime image ─────────────────────────────────────────
+FROM python:3.11-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1
+
+# Install nginx, supervisor, and gcc (for some pip packages)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    nginx \
+    supervisor \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Backend source
+COPY api_server.py airports.py cache.py ./
+COPY database/ ./database/
+
+# Frontend build output
+COPY --from=frontend-builder /app/dist /usr/share/nginx/html
+
+# Config files
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY supervisord.conf /etc/supervisor/conf.d/app.conf
+
+# Remove the default nginx site
+RUN rm -f /etc/nginx/sites-enabled/default
+
+# Pre-fetch airport data and initialise the database at build time
+RUN mkdir -p data && \
+    python -c "from airports import download_and_build_airport_data; download_and_build_airport_data()" && \
+    python database/init_db.py
+
+EXPOSE 80
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
+    CMD wget -q --spider http://localhost/ || exit 1
+
+CMD ["/usr/bin/supervisord", "-n", "-c", "/etc/supervisor/conf.d/app.conf"]

flight-comparator/Dockerfile.backend

@@ -1,47 +0,0 @@
-# Backend Dockerfile for Flight Radar API
-FROM python:3.11-slim
-
-# Set working directory
-WORKDIR /app
-
-# Set environment variables
-ENV PYTHONUNBUFFERED=1 \
-    PYTHONDONTWRITEBYTECODE=1 \
-    PIP_NO_CACHE_DIR=1 \
-    PIP_DISABLE_PIP_VERSION_CHECK=1
-
-# Install system dependencies
-RUN apt-get update && apt-get install -y \
-    gcc \
-    && rm -rf /var/lib/apt/lists/*
-
-# Copy requirements file
-COPY requirements.txt .
-
-# Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
-
-# Copy application code
-COPY api_server.py .
-COPY airports.py .
-COPY cache.py .
-COPY database/ ./database/
-
-# Create necessary directories
-RUN mkdir -p data
-
-# Download airport data on build
-RUN python -c "from airports import download_and_build_airport_data; download_and_build_airport_data()"
-
-# Initialize database
-RUN python database/init_db.py
-
-# Expose port
-EXPOSE 8000
-
-# Health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD python -c "import requests; requests.get('http://localhost:8000/health').raise_for_status()"
-
-# Run the application
-CMD ["python", "api_server.py"]

flight-comparator/Dockerfile.frontend

@@ -1,36 +0,0 @@
-# Frontend Dockerfile for Flight Radar UI
-# Stage 1: Build React application
-FROM node:20-alpine AS builder
-
-WORKDIR /app
-
-# Copy package files
-COPY frontend/package*.json ./
-
-# Install dependencies
-RUN npm ci
-
-# Copy source code
-COPY frontend/ .
-
-# Build production app
-RUN npm run build
-
-# Stage 2: Serve with nginx
-FROM nginx:alpine
-
-# Copy built assets from builder stage
-COPY --from=builder /app/dist /usr/share/nginx/html
-
-# Copy nginx configuration
-COPY nginx.conf /etc/nginx/conf.d/default.conf
-
-# Expose port
-EXPOSE 80
-
-# Health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD wget --quiet --tries=1 --spider http://localhost/ || exit 1
-
-# Start nginx
-CMD ["nginx", "-g", "daemon off;"]

flight-comparator/docker-compose.yml

@@ -1,54 +1,15 @@
 services:
-  # Backend API Server
+  app:
-  backend:
+    build: .
-    build:
+    container_name: flight-radar
-      context: .
-      dockerfile: Dockerfile.backend
-    container_name: flight-radar-backend
-    restart: unless-stopped
-    ports:
-      - "8000:8000"
-    environment:
-      - PORT=8000
-      - DATABASE_PATH=/app/data/cache.db
-      - ALLOWED_ORIGINS=http://localhost,http://localhost:80,http://frontend
-    volumes:
-      - backend-data:/app/data
-      - ./cache.db:/app/cache.db:rw
-    networks:
-      - flight-radar-network
-    healthcheck:
-      test: ["CMD", "python", "-c", "import requests; requests.get('http://localhost:8000/health').raise_for_status()"]
-      interval: 30s
-      timeout: 3s
-      retries: 3
-      start_period: 10s
-
-  # Frontend UI
-  frontend:
-    build:
-      context: .
-      dockerfile: Dockerfile.frontend
-    container_name: flight-radar-frontend
     restart: unless-stopped
     ports:
       - "80:80"
-    depends_on:
+    environment:
-      backend:
+      - DATABASE_PATH=/app/data/cache.db
-        condition: service_healthy
+    volumes:
-    networks:
+      - flight-radar-data:/app/data
-      - flight-radar-network
-    healthcheck:
-      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost/"]
-      interval: 30s
-      timeout: 3s
-      retries: 3
-      start_period: 5s
-
-networks:
-  flight-radar-network:
-    driver: bridge
 
 volumes:
-  backend-data:
+  flight-radar-data:
     driver: local

flight-comparator/nginx.conf

@@ -17,7 +17,7 @@ server {
 
     # API proxy
     location /api/ {
-        proxy_pass http://backend:8000;
+        proxy_pass http://localhost:8000;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';
@@ -30,7 +30,7 @@ server {
 
     # Health check endpoint proxy
     location /health {
-        proxy_pass http://backend:8000;
+        proxy_pass http://localhost:8000;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
     }

flight-comparator/supervisord.conf

@@ -0,0 +1,24 @@
+[supervisord]
+nodaemon=true
+logfile=/dev/null
+logfile_maxbytes=0
+pidfile=/tmp/supervisord.pid
+
+[program:api]
+command=python /app/api_server.py
+directory=/app
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+
+[program:nginx]
+command=nginx -g "daemon off;"
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0