docker-stack.yml

version: '3.1'

# run with docker-compose:
#
#     docker-compose -f docker-stack.yml up

# run with docker swarm:
#
#     docker swarm init
#     docker stack deploy --compose-file docker-stack.yml authdemo

volumes:
  web-data:

services:

  web:
    image: 'nginx'
    ## instead of an exposed port, use FORWARD_PORT in auth, below
    # ports:
    #   - '80:80'
    volumes:
      - web-data:/usr/share/nginx/html:ro
  
  auth:
    image: 'beevelop/nginx-basic-auth'
    ports:
      - '8080:80'
    environment:
      - PORT=80
      - FORWARD_HOST=web
      - FORWARD_PORT=80
      ## escape $ with $$ in Docker yml due to variable expansion
      ## example user/pass generated with htpasswd is foo:bar
      - HTPASSWD=foo:$$apr1$$odHl5EJN$$KbxMfo86Qdve2FH4owePn.