docker-compose.dev.yml

version: "3.6" #This denotes that we are using version 3 of Docker Compose
services:
    #This section defines all the different containers we will create.
    lo-exchange-frontend:
        #This is the name of our Nextjs application.
        build:
            #This specifies the location of our Dockerfile
            context: . #This specifies the location of our Dockerfile
            dockerfile: Dockerfile.dev
        command: dev
            #command to execute
            #This is just like the -v option for mounting disks in Docker. In this              example, we attach our code files directory to the containers’ ./code              directory.  This way, we won’t have to rebuild the images if changes are           made.
        volumes:
            - .:/usr/src/app
            - /usr/src/app/node_modules
            - /usr/src/app/.next
        ports:
            #This is used to map the container’s ports to the host machine.
            - "3000:3000"