Description

This PR adds a systemd service definition for managing the coaching platform starting/stopping/restarting backend and frontend containers.

Currently, it needs to be manually copied over and installed onto the production server. Once in place, it shouldn't need to be reinstalled unless we have a new version of refactor-platform.service.

GitHub Issue: Implements #133 but does not fully close it yet.

Changes

• Add a systemd service definition for managing the coaching platform containers starting/stopping/restarting
• Remove outdated docs/runbooks/deploy.md runbook and replace with relevant instructions covering systemd service management

Testing Strategy

1. Try starting the containers using systemctl as the deploy user, like so: systemctl start refactor-platform.service
2. Ensure the containers all start and are running (refactor-platform-frontend, refactor-platform-backend): docker ps
3. View the logs using journalctl as the deploy user, like so: journalctl -xeu refactor-platform.service
4. Try stopping the containers using systemctl as the deploy user, like so: systemctl stop refactor-platform.service
5. Ensure the containers all stop and are not running (refactor-platform-frontend, refactor-platform-backend): docker ps
6. Try restarting the containers using systemctl as the deploy user, like so: systemctl restart refactor-platform.service

Concerns

None