Here's an example docker-compose.yml which mounts a directory to be our external config directory.
Note that we open ports 80 and 443, for http and https respectively.

== docker-compose.yml ==
version: "2"
services:

  neo4j:
    ports:
      - 8476:7474
    image: menome/thelink-neo4j-main
    restart: always
    volumes:
      - /docker/neo4j/data:/var/lib/neo4j/data
      - /docker/neo4j/import:/var/lib/neo4j/import
  web:
    image: menome/thelink-dialog-web
    ports:
      - 80:3000
      - 443:443
    volumes:
      - /docker/thelink/ext_conf:/srv/theLink/ext_config
    links:
      - neo4j
    restart: always