docker compose file with bun backend and postgresql db

.env

DATABASE_URL=postgresql://omar:121212@localhost:5432/db

POSTGRES_USER=omar
POSTGRES_PASSWORD=121212
POSTGRES_DB=db

docker-compose.yml

volumes:
  pg_data:




services:
  backend:
    build: .
    container_name: bun_backend
    ports:
      - "3000:3000"
    environment:
      - DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}
    depends_on:
      db:
        condition: service_healthy




  db:
    image: postgres:16-alpine
    container_name: postgresql
    ports:
      - "5432:5432"
    env_file: .env
    volumes:
      - pg_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U omar"]
      interval: 5s
      timeout: 3s
      retries: 5

Dockerfile

FROM oven/bun:1

WORKDIR /app
COPY package.json .
COPY bun.lock .
RUN bun install
COPY index.ts .

CMD ["bun", "dev"]