docker-compose.yml

version: '3' # specify docker-compose version

# Define the services/containers to be run
services:
    angular: # name of the first service
        build: frontend # specify the directory of the Dockerfile
        container_name: frontend
        restart: unless-stopped
        ports:
            - "4200:4200" # specify port forwarding


    express: #name of the second service
        build: backend # specify the directory of the Dockerfile
        container_name: backend
        environment:
            - PORT=3000
            - MONGO_URL=mongodb://database/crud-db
        restart: unless-stopped
        ports:
            - "3000:3000" #specify ports forwarding
        links:
            - database


    database: # name of the third service
        image: mongo # specify image to build container from
        container_name: mongo
        ports:
            - "27017:27017" # specify port forwarding