Feature Idea: Custom Database location

[Nrosa01]

Summary

Currently database is stored at the /Documents/Focalboard directory in windows, presumably similar in MacOS and Linux. This proposal suggests adding a custom database location.

How important this is to me and why

Importance: Medium

I like focalboard as it's a fully portable app, but not being able to have the database in the same dir as the executable makes it more cumbersome to move across devices.

Use cases:

1. Having a focalboard executable and database in a pendrive, so it's fully portable
2. Having a folder with differente databases, being able to tell focalboard at anytime what database to load

Additional context/similar features

None

Any examples of good implementations of this capability: In the settings menu, add an entry called "Set Database location" that opens a native file explorer dialog and allows to choose an existing .db or a directory where it will be created. This setting is persistent. The focalboard path should be stored in a file next to the executable so focalboard can remain fully portable.