README.md

JupyterLab 4.3.5 with custom favicon

To customize:

1. Find pageConfig by opening source of JupyterLab tab in the browser (e.g. Ctrl + U)
2. Determine template source from value of templatesDir in pageConfig (here /srv/conda/envs/notebook/share/jupyter/lab/static/)
3. Determine a suitable destination to store your templates and set it in the server config file, adjusting c.LabApp.templates_dir accordingly (here /home/jovyan/ just out of convenience)
4. Put index.html in the destination directory
5. Copy original index.html from source into the destination as base.html

index.html

{% extends "base.html" %}

{% block favicon %}
     <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>💤</text></svg>" class="idle favicon">
     <link rel="" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🔥</text></svg>" class="busy favicon">
{% endblock %}

jupyter-config.json

{
  "LabApp": {
    "templates_dir": "/home/jovyan"
  }
}

requirements.txt

jupyterlab==4.3.5

start

#!/bin/bash

set -e

echo $@
cp /srv/conda/envs/notebook/share/jupyter/lab/static/index.html /home/jovyan/base.html
exec jupyter-lab "${@:4}" --config jupyter-config.json