Database migration feature
Currently, if the controller is modified in a way that involves the database structure, is necessary to delete the former contest_db database on mysql and than regenerate it using the procedure shown in https://gitlab.fbk.eu/ITC4Energy/contest.
This means that all the infos stored in the former database will be lost, and at production time this could be potentially and issue.
Should be analyzed and implemented a solution to handle the migration of the data from the former database to the new one.
The solution should be automatized as much as possible.