Update installation.md (#268)

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Kevin Yamauchi <kevin.yamauchi@gmail.com>

Author: 3 people

docs/_static/img/spatialdata_horizontal.png

@@ -34,12 +34,22 @@ pip install "spatialdata[torch]"
 
 ## Development version
 
-To install `spatialdata` from GitHub, run::
+To install `spatialdata` from GitHub, run:
 
 ```bash
 pip install git+https://github.com/scverse/spatialdata
 ```
 
+Alternative you can clone the repository and do an editable install with:
+
+```bash
+pip install -e .
+```
+
+This is the reccommended way to install the package in case in which you want to contribute to the code. To update the package you can use `git pull`.
+
+Important: if you perform an editable install of `spatialdata` and then install `spatialdata-plot`, `spatialdata-io` or `napari-spatialdata`, they may automatically override the installation of `spatialdata` with the version from PyPI. To check if this happened you can run `python -c "import spatialdata; print(spatialdata.__path__)"`: if you get a path that contains `site-packages`, then your editable installation has been overridden and you need to reinstall the package by rerunning `pip install -e .` in the cloned `spatialdata` repo.
+
 <!-- Links -->
 
 [napari-spatialdata]: https://github.com/scverse/napari-spatialdata