GitHub has built-in support for Jupyter Notebooks. Bitbucket supports Jupyter Notebooks via a fileview addon. It works on both publick and private notebooks. Follow the steps below to install the addon.
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Click on your avatar in the lower left corner on your homepage of Bitbucket.

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Select the option
App marketplace. -
Find the addon
Notebook Viewerin the listings. -
Install the addon
Notebook Viewer. -
Open a notebook in one of your Bitbucket repository.
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Click on
Default file viwer(to the left of the button Edit) and selectIPython Viwer.
Reference
https://bitbucket.org/site/master/issues/11318/enable-rich-rendering-of-jupyter-notebooks