React boilerplate

[hhartwell]

@ mention of reviewers

@ckcollab

A brief description of the purpose of the changes contained in this PR.

adds a react frontend folder and modifies skeletor.sh to replace src/frontend with src/react_frontend

currently, the react frontend includes a login page and the default react landing page once a user is logged in

Known issues to be addressed in a separate PR

...

Hand testing

• curl the bash script and hit the option 3 for Available Frontends
• should work and set up a docker environment to work in.
• curl again and select option 1. this should work as expected

Any relevant files for testing

link to any relevant files (or drag and drop into github)

Misc. comments

...

Checklist

• Code review by me
• New code covered by automated tests
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• Ready to merge

[ckcollab]

fyi I added something like this to master, so can prob pull this -- hit /api/auth/user/ like how it used to work