Document deployment to Hugging Face Spaces (#4143)

doc/user_guide/Server_Deployment.md

@@ -209,6 +209,59 @@ Finally, to deploy a Panel app to App Engine run `gcloud app create` and `gcloud
 
 For detailed information and steps, check out this [example](https://towardsdatascience.com/deploy-a-python-visualization-panel-app-to-google-cloud-cafe558fe787?sk=98a75bd79e98cba241cc6711e6fc5be5) on how to deploy a Panel app to App Engine and this [example](https://towardsdatascience.com/deploy-a-python-visualization-panel-app-to-google-cloud-ii-416e487b44eb?sk=aac35055957ba95641a6947bbb436410) on how to deploy a Panel app to Cloud Run.
 
+#### Hugging Face
+
+The guides below assumes you have already signed up and logged into your account at [huggingface.co](https://huggingface.co/).
+
+##### Duplicate an existing space
+
+The easiest way to get started is to  [search](https://huggingface.co/spaces), find and duplicate an existing space. A simple space to duplicate is
+[MarcSkovMadsen/awesome-panel](https://huggingface.co/spaces/MarcSkovMadsen/awesome-panel).
+
+- Open the space [MarcSkovMadsen/awesome-panel](https://huggingface.co/spaces/MarcSkovMadsen/awesome-panel).
+- Click the 3 dots and select *Duplicate this Space*.
+
+<img src="../_static/hugging-face-duplicate.png" style="width:67%"></img>
+
+- Follow the instructions to finish the duplication.
+
+Once you have finalized the duplication you will need to take a look at the `app.py` file in the new space to figure out what to replace.
+
+<img src="../_static/hugging-face-app-py.png" style="width:67%"></img>
+
+##### Creating a new space from scratch
+
+You can deploy Panel to Hugging Face Spaces as a [*Custom Python Space*](https://huggingface.co/docs/hub/spaces-sdks-python). For a general introduction to Hugging Face Spaces see the [Spaces Overview](https://huggingface.co/docs/hub/spaces-overview).
+
+Go to [Spaces](https://huggingface.co/spaces) and click the "Create New Space" button.
+
+<img src="../_static/hugging-face-create-new-space.png" style="width:67%"></img>
+
+Fill out the form. Make sure to select the *Gradio Space SDK*.
+
+<img src="../_static/hugging-face-create-spaces-form.png" style="width:67%"></img>
+
+A Gradio space will serve your app via the commmand `python app.py`. I.e. you cannot run `panel serve app.py ...`.
+
+To work around this your `app.py` will need to either
+
+- Use `subprocess` to run `panel serve ...` or
+- Use `pn.serve` to serve one or more functions.
+
+The app also needs to run on a port given by the `PORT` environment variable.
+
+Check out the example repository [MarcSkovMadsen/awesome-panel](https://huggingface.co/spaces/MarcSkovMadsen/awesome-panel/tree/main) for inspiration.
+
+##### Git clone
+
+Optionally you can git clone your repository using
+
+```bash
+git clone https://huggingface.co/spaces/NAME-OF-USER/NAME-OF-SPACE
+```
+
+<img src="../_static/hugging-face-git-clone.png" style="width:67%"></img>
+
 #### Other Cloud Providers
 
 Panel can be used with just about any cloud provider that can launch a Python process, including Amazon Web Services (AWS) and DigitalOcean. The Panel developers will add documentation for these services as they encounter them in their own work, but we would greatly appreciate step-by-step instructions from users working on each of these systems.