Rename env var TORRUST_TRACKER_DATABASE to TORRUST_TRACKER_DATABASE_DRIVER

[josecelano]

Hi @da2ce7, I think the name TORRUST_TRACKER_DATABASE can be confusing. I thought it was the database name. In the tracker configuration file (and in the code), we use the word driver to refer to the type of database system the tracker uses.

In fact, that could be the prefix (TORRUST_TRACKER_DATABASE_*) for all options related to the database.

db_driver = "Sqlite3"
db_path = "./storage/database/data.db"

[da2ce7]

Yep, TORRUST_TRACKER_DATABASE_DRIVER is a better naming.

[da2ce7]

done in #418