Add RTL support to one page in an application.

Hello,

I have an open-source project that is called Doccano.
https://github.com/doccano/doccano

I want to add RTL support to the 'sequence labeling' page.
there's a Github issue that documents the solution.
https://github.com/doccano/doccano/issues/769

I prefer the changes to be in A Docker image.

Thanks,
Rayan