Checkpoint to make sure config file is set up correctly added to the getting started guide

[miertla]

Description

Added a quick checkpoint to ensure the config file is set up correctly prior to users importing their music library. This was something I discovered later after running into an issue with my config file and hope it helps new users avoid the issues I had.

To Do

• Documentation. (If you've add a new command-line flag, for example, find the appropriate page under docs/ to describe it.)
• Changelog.(not required, @JOJ0 patched it out)
• Tests. (Encouraged but not strictly required.)

[sampsyo]

It's not a bad idea to have something like this! I have a suggestion for keeping this short and to the point; let me know what you think.

[JOJ0]

Applied suggestion and merging this tiny docs improvement.