docker-compose.yml

web:                  # Container Name
  build: .            # Build
  links:              # Links
    - elasticsearch
  ports:              # Ports
    - 3000
  environment:        # Environment
    VIRTUAL_HOST: ’www.katacoda.com'
    NODE_ENV: 'production’

elasticsearch:        # 2nd Container Name
  image: elasticsearch:1.5 # Use Image
  ports:              # Ports
    - 9200:9200

Migrate this to match Redis / NodeJs app

Rogue quotes formatting in the VIRTUAL_HOST and NODE_ENV properties!

cat docker-compose.yml
web:
image: katacoda/redis-node-docker-example
links:
- redis:redis
ports:
- 3000:3000

redis:
image: redis:3.2