@Flixanoa
The cause of slowness since this weekend is due to some test I do on the server who designated to host the instance.
I copy the files and the database (and it load more on the drive) after that, since the Sunday evening, it's the weekly save on one of the save server.
Should be better in few hours when this save is done.
I still working on the problem, just, it's not a funding problem currently, but a free time problem.
@CrystalLord
The test I do this weekend is to test the importing the database (some duplication problem spotted) also testing if the docker file is correctly configured.
For the next weekend, I will try to test if the interface and the other things work corrctly.
Only after that I can think to migrate the instance.