Mutagen compose example

docker-compose.yml

version: "3.7"
services:
  drupal:
    depends_on:
      - db
    build: ./app
    restart: unless-stopped
    volumes:
      - code:/app # mount the mutagen volume
    environment:
      COMPOSER_MEMORY_LIMIT: -1
  
  db:
    image: mysql:8.0
    env_file:
      - ./docker.env
    restart: unless-stopped
    stop_grace_period: 30s

# declare our volume
volumes:
  code:

x-mutagen:
  sync:
    drupal:
      # https://mutagen.io/documentation/synchronization
      alpha: "./app" # local file system
      beta: "volume://code/app" # container file system. Notice I don't mount the root of the volume itself. 
      mode: "two-way-safe" #https://mutagen.io/documentation/synchronization
      ignore:
        vcs: true # exclude version control
        paths: # exclude the junk we don't need from being synced
          - "**/node_modules/**"
          - "**/vendor/**"
      # permissions get kind of screwed up inside the container when mounting hence why the beta directory is 1 folder deep. This helps get around permissions issues.    
      configurationBeta:
        permissions:
          defaultFileMode: 0666
          defaultDirectoryMode: 0777
  # This kind of replaces the standard port forwarding. Pretty much works the same as normal forwarding and the old way still works.
  forward:
    drupal:
      source: "tcp:localhost:8080"
      destination: "network://default:tcp:drupal:80"
    db:
      source: "tcp:localhost:3306"
      destination: "network://default:tcp:db:3306"