Update Dockerfile

[zekroTJA]

Update Dockerfile

Description

I've added git as install dependency to the install list to fix the issue described in #1508. Also, I've set the default working directory /music as volume so that, if not changed or mounted specifically, downloaded content still persists after removal of the container.

Related Issue

#1508

Motivation and Context

First, it solves the issue described in #1508 and makes the image buildable. Also, it provides a simple fix for an issue, I ran into, which lead to loss of all my downloaded content because I mounted the wrong directory. By automatically creating a volume on the default download directory, this can be prevented as long as the user does not alter the output directory.

How Has This Been Tested?

I've cloned my fork with the changes and built the image which I've then used to download my Spotify library.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have read the CORE VALUES document
• I have added tests to cover my changes
• All new and existing tests passed

[xnetcat]

Looks good, can you also open PR for v4 if you want.

[xnetcat]

Also change base branch from master to dev