Document Running Notebook over SSH Tunnel

I installed Jupyter in a virtual environment on the server using:
```bash
pip install jupyterlab
```
And configured it as follows:
```
c.LabApp.ip = ''
c.LabApp.password = u'sha1:*******' # not shown here
c.LabApp.open_browser = False
c.LabApp.port = 8890
c.LabApp.allow_remote_access = True
```
Then I established an SSH tunnel to access it locally via port 8890:
```
ssh -L 8890:localhost:8890 your_username@your_server_ip
```
However, when I enter `http://localhost:8890/lab` in the browser, it shows "invalid HTTP response." How can I fix the issue? Thanks for your help!

The issue names JupyterLab configuration and an SSH -L tunnel but no repository file, test, or code entry point. Start by reproducing the localhost:8890/lab request through the shown tunnel and compare the browser response with the server setup; done would mean identifying a documented fix for the invalid HTTP response.

Written by the indexing model from the issue text.