Deploy Ruby on Rails apps (+ NGINX) to ECS with Docker - Medium

docker-compose.yml

# 1.Specify the compose file format; we're using the last one. 
#   If you're curious, at https://docs.docker.com/compose/compose-file/compose-versioning/ 
#   you can find an extensive description on the difference among versions
version: '3' 
# 2.Specify the list of services that will be built. In our case, app (Ruby on Rails) and web (NGINX)
services:  
  app:    
    build:      
      # 2.1.Specify the root path
      context: .
      # 2.2.From the root path defined in context, here we define where the Dockerfile resides
      dockerfile: ./docker/app/Dockerfile    
  web:    
    build:      
      context: .
      dockerfile: ./docker/web/Dockerfile    
    # 2.3.Like depends_on, links expresses dependency among services. In our case, app and web
    links:      
      - app  
    # 2.4.Binds port 80 for public connections
    ports:      
      - 80:80