version: '3.1' # if no version is specificed then v1 is assumed. Recommend v2 minimum

services: # containers. same as docker run
servicename: # a friendly name. this is also DNS name inside network
image: # Optional if you use build:
command: # Optional, replace the default CMD specified by the image
environment: # Optional, same as -e in docker run
volumes: # Optional, same as -v in docker run
servicename2:

volumes: # Optional, same as docker volume create

networks: # Optional, same as docker network create