docker-compose-dev.yml

services:
  postgres:
    image: postgres:10
    environment:
      - POSTGRES_PASSWORD=penguin
  redis:
    image: redis:4
  nginx: # Needed to route requests to applicable react/express server.
    restart: always # Always restart container if it dies--otherwise site can't be accessed.
    build:
      dockerfile: Dockerfile.dev
      context: ./nginx
    ports:
      - 3050:80
    depends_on: # Requires that api and client containers start before nginx container. Does not make sure containers are fully ready but are STARTED in the correct order.
      - api
      - client
  api:
    build:
      dockerfile: Dockerfile.dev  # Do not have to specify location, just file name. Context specifies location.
      context: ./server   # Tells us where to find the Dockerfile.
    volumes:
      - /app/node_modules # Do NOT override this folder (normal volume).
      - ./server:/app # Bind mounts everything inside server directory to container's app directory.
    environment: # Keys found in server/keys.js.
      - REDIS_HOST=redis # References the redis service in the compose file.
      - REDIS_PORT=6379 # From redis documentation.
      - PGUSER=postgres # From postgres documentation.
      - PGHOST=postgres # References postgres service in compose file.
      - PGDATABASE=postgres # From postgres documentation.
      - PGPASSWORD=penguin # References postgres environment password in compose file.
      - PGPORT=5432 # From postgres documentation.
  client:
    build:
      dockerfile: Dockerfile.dev
      context: ./client
    volumes:
      - /app/node_modules
      - ./client:/app
    environment:
      - WDS_SOCKET_PORT=0
  worker:
    build:
      dockerfile: Dockerfile.dev
      context: ./worker
    volumes:
      - /app/node_modules
      - ./worker:/app
    environment:
      - REDIS_HOST=redis
      - REDIS_PORT=6379