GHA test workflow - docker-compose using the images built with Dockerfiles

docker-compose.test.yml

version: '3.8'

services:
  test:
    image: ${TEST_IMAGE_TAG:-test}
    depends_on: 
      - database
      - chrome
    environment:
      HUB_URL: http://chrome:4444/wd/hub
      PARALLEL_WORKERS: 1 # makes tests run sequentially instead of simultaneously
    command: >
      bash -c "rails test && rails test:system"
      
  database:
    image: ${DB_IMAGE_TAG:-db}
    restart: unless-stopped
    ports: 
      - 5432:5432
    environment:
      POSTGRES_PASSWORD: postgres

  chrome:
    image: ${CHROME_IMAGE_TAG:-chrome}
    ports:
      - 4444:4444
      - 5900:5900
    volumes:
      - /dev/shm:/dev/shm