Complete remaining tasks: deployment config, announcement pages

docker-compose.yml

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+version: '3.8'
+
+services:
+  db:
+    image: postgres:16
+    environment:
+      POSTGRES_DB: RacePlanner
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    environment:
+      ASPNETCORE_ENVIRONMENT: Production
+      ConnectionStrings__DefaultConnection: Host=db;Database=RacePlanner;Username=postgres;Password=postgres
+      Jwt__Key: your-super-secret-key-minimum-32-characters-long-here
+    ports:
+      - "5000:80"
+    depends_on:
+      db:
+        condition: service_healthy
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    environment:
+      NEXT_PUBLIC_API_URL: http://localhost:5000/api
+    ports:
+      - "3000:3000"
+    depends_on:
+      - backend
+
+volumes:
+  postgres_data: