docker-compose template

.env

COMPOSE_PROJECT_NAME=template
VAR_FROM_FILE=anyvalue
VAR_FROM_FILE_WITH_THE_SAME_NAME=any_other_value

docker-compose.yaml

version: '3.7'

services:
  foo:
    image: busybox
    environment:
      - ANYVAR=anyvalue
      - VAR_FROM_FILE=${value_from_file}
      - VAR_FROM_FILE_WITH_THE_SAME_NAME
    volumes:
      - data:/data
      - /etc/timezone:/etc/timezone:ro
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
    ports:
      - 12345:80
    restart: unless-stopped

volumes:
  data:

networks:
  default__:
    driver: bridge
    ipam:
      driver: default
      config:
      - subnet: 33.0.0.1/16