WIP - Faster load of binderhub

[sk-sahu]

Summary

This PR is trying to address the faster load of binderhub Jupyter session.

• Have a prebuid container. sudosk/mosotf:latest
• Link the repo to dockerhub for auto-build

If this above doesn't solves the faster loading

• Add a cron job using Github actions to build the binderhub image in every certain interval (may be 2 weeks, need to check what the availability of cache from biderhub).

[krassowski]

I guess will also need to install deps from apt.txt.

I manually created a conda environment for Binder because it is faster than compiling the R dependencies, but if we are pre-building (and if possible) a better alternative might be to install from requirements.txt and restore R dependencies with renv as described in our README.