Containerize the app

In order to deploy by using gitlab CI the apps should be somehow containerized. It can be done in multiple ways, for instance:

• docker and docker compose
• One nxginx/application or all apps in the same nxginx

I put the code I did quickly for inspiration. Run:

docker compose build
docker compose run

It should starts two instances of nxginx at port 3000 and 4000.

However, I have the feeling that a single server with all the apps (it fixes the problem of port 3000) might have benefits. Procedure described here: https://medium.com/@mattklein123/monorepos-please-dont-e9a279be011b