feat: bootstrap backend with docker and healthcheck

.env

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+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=card_game_db

backend/Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

backend/app/main.py

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+from fastapi import FastAPI
+
+app = FastAPI(title="Card Game Backend")
+
+@app.get("/health")
+def health_check():
+    return {"status": "ok"}

backend/requirements.txt

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+fastapi
+uvicorn
+sqlalchemy
+psycopg2-binary
+asyncpg

docker-compose.yml

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+version: '3.8'
+
+services:
+  backend:
+    build: ./backend
+    ports:
+      - "8000:8000"
+    environment:
+      - DB_HOST=postgres
+      - DB_USER=${POSTGRES_USER}
+      - DB_PASS=${POSTGRES_PASSWORD}
+      - DB_NAME=${POSTGRES_DB}
+    depends_on:
+      - postgres
+    networks:
+      - card-game-network
+
+  postgres:
+    image: postgres:15-alpine
+    environment:
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - card-game-network
+
+networks:
+  card-game-network:
+    driver: bridge
+
+volumes:
+  postgres_data: