React returning not found on refresh

[PeterMyer]

Bug resolved. Detailed outline of cause can be found in Stack Overflow: react routing works in local machine but not heroku

Resolution:

• update homepage to byte heroku address in root project-json.
• add static.json file to root directory, as outlined in above link
• add heroku nginx buildpack for static pages
• change app.get('/') to app.get('/*) for routes in server/app.js