- Add ligo_webide_build_info metric that surface revision and branch from CI
- Add a version sub state which contains the current revision and branch of frontend
- Added back express-prometheus-middleware
When this is merged https://gitlab.com/ligolang/ligo-web-ide/ will be
marked as deprecated.
This MR does not hook up the webide build to the main CI. The CI
integration will come in a subsequent MR for the sake of making review
easier.
