Using overlay network degrades performance a lot. To be figured it out.

gogits/gogs -> gogs/gogs
See: https://github.com/gogs/gogs/issues/5248#issuecomment-392525083

After upgrade to PHP 7.2, `-y` option to `apt-get install` was missing.

To be able to use Passwords app.

Plus add own registry info and update TODO section

Changes to be committed:
	modified:   add_users.sh
	modified:   deploy.sh

- Wait for NC instance to be ready to call Let's Encrypt script.
- Add parameter to build or not container images.