the script is created and called on container startup, same as the ESD kernel activation script

the script is created and called on container startup, to separate the base image itself from the jupyterhub service configuration as much as possible

- pin jupyterlab version to <4
- make sure widget package versions are compatible with the ESD
- all other jupyter extensions (e.g. the TVB ones) will be loaded from the ESD deployment at startup

switch to latest stable image (Ubuntu 24.04, Python 3.11, R 4.3.3)

(but keep anything jupyter-related for now)

and drop everything already available there

Spinnaker config

See merge request jupyter/clb-jupyter-nb-images!40

Update tvb-widgets version

See merge request jupyter/clb-jupyter-nb-images!39

Update tvb-ext-bucket

See merge request jupyter/clb-jupyter-nb-images!37

Base image cleanup

See merge request jupyter/clb-jupyter-nb-images!38

This reverts commit 75ecec25

Upgrade tvb related packages

See merge request jupyter/clb-jupyter-nb-images!36

Downgrade numpy for compatibility with latest numba version

See merge request jupyter/clb-jupyter-nb-images!35