Changed react-scripts start to serve -s build in frontend package.json and added relevant dependency install commands to help memory usage when building for heroku dynos with limited RAM.
Added a Procfile for Heroku which specifies to allocate a frontend and backend dyno.
Added root level package.json to designate to Heroku that the project is a nodejs project.
Added temporary properties file for Google API key so that frontend can call Google APIs. This will be removed in the future when we find a way to pass it in without committing the API key to repo.
Added a dev command to frontend/package.json so that we can continue dev work.