Is your feature request related to a problem? Please describe.
The current setup with 4 repos (app, 2 libs and CLI) is cumbersome:

• requires multiple pulls/branches
• requires to use npm link locally
• harder to test: tests have to be local as there is no integrated automated tests between the 4 repos
• harder to do PRs and contribute (pipelines won't pass for commons-server, app and CLI as libs may not be published yet on NPM)
• requires libs publication on NPM to be consumed by app and CLI

Describe the solution you'd like
Move to a monorepo where only app and CLI would be subject to releases

• very easy to run all the tests
• no more branches synchronisation issues
• easier to contribute

Investigation needed

• how to release app and CLI separately? Builds and releases cycles are very different.