Update UI endpoint to new FE heroku link

[janitastic]

Is this a fix or a feature?

• [ ] Bug fix
• [ ] Feature
• [x] Refactor

Describe the feature - fix - refactor: Update UI endpoint

How was this tested?

• [ ] open index.html
• [x] localhost
• [ ] terminal

Where should the reviewer start - test: Cors ruby file.

Additional comments: