docker-compose.yml

version: '3.7'

services:
  app:
    build: .
    expose:
      - ${APP_PORT}
    ports:
      - ${APP_PORT}:${APP_PORT}
    env_file:
      - .env
    depends_on:
      - app_db
    environment:
      - DB_HOST=app_db
  app_db:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_DATABASE: '${DB_DATABASE}'
      # So you don't have to use root, but you can if you like
      MYSQL_USER: '${DB_USERNAME}'
      # You can use whatever password you like
      MYSQL_PASSWORD: '${DB_PASSWORD}'
      # Password for root access
      MYSQL_ROOT_PASSWORD: '${DB_PASSWORD}'
      # Allow Empty Password
      MYSQL_ALLOW_EMPTY_PASSWORD: ${DB_ALLOW_EMPTY_PASSWORD}
    ports:
      # <Port exposed> : < MySQL Port running inside container>
      - '${DB_PORT}:3306'
    expose:
      # Opens port 3306 on the container
      - '${DB_PORT}'
      # Where our data will be persisted
    volumes:
      - db_data:/var/lib/mysql
# Names our volume
volumes:
  db_data: