add user home dir

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 87.87879% with 4 lines in your changes missing coverage. Please review.

Project coverage is 62.36%. Comparing base (c0e6b10) to head (637480f). Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
src/jupyterhub_config/custom_spawner.py	87.87%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #80 +/- ## ========================================== + Coverage 57.14% 62.36% +5.22% ========================================== Files 5 5 Lines 154 186 +32 ========================================== + Hits 88 116 +28 - Misses 66 70 +4 ```

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