My docker-compose setup for jupyterlab. Dockerfile derives from official jupyterlab-docker-stacks and modified for installing python packages and jupyterlab extensions without touching Dockerfile. Currently, this setup installs jupyterlab-scheduler extension to be able to put notebooks in cron jobs.

• Only python packages loaded from requirements.txt. Load jupyterlab extension install calls in Dockerfile from a file that consists a list of jupyterlab extensions.
• Build takes so much time during fix-permissions
• Does cron service start after container starts?

• Using mamba install or pip install in a Child Docker image
• jupyterlab_scheduler docs - Installation within Jupyter Docker container?