container machine-learning-ui requires mistune < 2.0.0

[MichelBr]

I tried out the machine-clearning-ui container but I can't even open a notebook. From what I found out, it's due to mistune >= 2.0.0 being incompatible with the current jupyter. It requires mistune < 2.0.0.

P.S.: It would also be nice if you had different tags for different python-releases instead of only the latest one. Tx!

[MichelBr]

fyi, I can confirm this fixes the issue after committing this fix to the image and recreating the container