docker-compose.yml

version: '3' # version of docker compose
services: # the containers we are building
    web: # the name of the container
        build:
            context: . # reference the current working directory
            dockerfile: Dockerfile.dev #explicitly call the dev dockerfile
        ports: 
            - "3000:3000"
        volumes:
            - /app/node_modules # do not try to mount outside the container
            - .:/app # mount the current directory to /app inside the container
    tests:
        build:
            context: . # reference the current working directory
            dockerfile: Dockerfile.dev #explicitly call the dev dockerfile
        volumes:
            - /app/node_modules # do not try to mount outside the container
            - .:/app # mount the current directory to /app inside the container
        command: ["npm", "run", "test"]