freeCodeCamp/docker/docker-compose.ports.yml

# Host ports for the setup without a container. The dev container omits
# this file, because a service sharing the db network namespace cannot
# publish a port.
services:
  db:
    ports:
      - 27017:27017

  mailpit:
    ports:
      - '1025:1025'
      - '8025:8025'