Jupyternotebook feature and testing

[nan3037]

Description

The backend can accept .ipynb files now. Adding a latex module jupynotex in app\views\layouts\application.pdf.erbtex and new MIME type for ipynb in app\helpers\file_helper.rb.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Test was conducted by trying to upload and `.ipynb' file and was run successfully as the file was accepted. Run unit test for the same that passed.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation if appropriate
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have created or extended unit tests to address my new additions
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules