I moved to GitLab, so no more deployments. Update README. Add pre-commit
hooks.

Instead of binding to a higher port, grant the apache2
CAP_NET_BIND_SERVICE to bind to port 80.

- Use the alternative HTTP port (so a limited user can be used).
- Run as a limited user.
- Add documentation.
- Add a Docker Compose file for local testing and as an example.

Standard or empty files for a project such as this.