🚀 Feature: Add external postgres database support

[edbourque0]

Feature description

Add the option to connect to an external Postgres database to store the data, replacing sqlite. The database information could be entered as environment variables (host, port, username, password). Could add these env var : DB_TYPE (sqlite or postgres), DB_HOST, DB_PORT, DB_USER, DB_PASS.

Pitch

I personally like to have control over my app's data. I have a postgres database that stores all of it and it's easier to update some data thru this. My usecase for now would be to update the approximate location which are all set to unknown before I entered my maxmind licence.