Configure which port to run service on.

[Susapp]

This is maybe not so much of an Issue, but more like a feature request.

My problem: When running this service in docker I have a clash with another service already running on port 22. Therefore it would be neat to be able to specify which port to start the service on. If there already is a way to do this, I couldn't find any documentation for it so please advise.

From my docker-compose.yaml

    image: "emberstack/sftp"
    ports:
     - "2222:2222"
    volumes:
      - ./sftp/config.json:/app/config/sftp.json:ro
      ```

Output from docker 
```sftp_1              | [INF] (ES.SFTP.Host.SSH.SSHService) Starting 'sshd' process
sftp_1              | [INF] (ES.SFTP.Host.SSH.SSHService) Started
sftp_1              | [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Server listening on 0.0.0.0 port 22.
sftp_1              | [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Server listening on :: port 22.

Even though I specify which port I want to run it on it gets ignored.

[stale]

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[stale]

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