version: '3' #Specifies the Compose file syntax version. 

services: #service is the name for a “Container in production”
  servicename: #container service name
    image: #optional, specify if build specific
    command: #optional, relmand CMD specified in image
    environment: #optional, similar to -e in Docker run command
    volumes: #optional, similar to --mount in docker run
  servicename2:

volumes: #Optional, Mounts a linked path on the host machine that can be used by the container.

networks: #Optional, Same as Docker Network