docker-compose.yml

version: '3.9' # Specifies the Docker Compose file format version

services:
  nextjs: # Service definition for the Next.js application
    image: node:20 # Uses the official Node.js 18 image as the base
    container_name: nextjs_server # Names the container for the Next.js server
    working_dir: /app # Sets the working directory inside the container
    volumes:
      - .:/app # Mounts the current directory to /app in the container
    ports:
      - "3000:3000" # Maps port 3000 on the host to port 3000 in the container
    command: > # Command to run inside the container
      sh -c "npm i --force && prisma generate && npx prisma db push --accept-data-loss && npm run dev"
    environment:
      DATABASE_URL: "postgresql://postgres:postgres@postgres:5432/mydb" # Environment variable for connecting to the PostgreSQL database
    depends_on:
      - postgres # Ensures the postgres service starts before this service

  postgres: # Service definition for the PostgreSQL database
    image: postgres:15 # Uses the official PostgreSQL 15 image
    container_name: postgres_server # Names the container for the PostgreSQL server
    environment:
      POSTGRES_USER: postgres # Sets the username for the database
      POSTGRES_PASSWORD: postgres # Sets the password for the database
      POSTGRES_DB: mydb # Sets the default database name
    ports:
      - "5432:5432" # Maps port 5432 on the host to port 5432 in the container
    volumes:
      - postgres_data:/var/lib/postgresql/data # Mounts a named volume to persist database data

volumes:
  postgres_data: # Defines a named volume for persisting PostgreSQL data