Run the following command to run your app on your localhost:
npm start
This application uses mLab to host its MongoDB database. To host a database, sign up on mLab and create a new database. Copy the URI located on the top level of your database. It looks like this:
mongodb://<dbuser>:<dbpassword>@ds123456.mlab.com:12345/<database>
In the 'db' folder, there is a file called 'mongo.example.js'. Create a copy of 'mongo.example.js' and rename it to 'mongo.js', so the .gitignore recognizes it and prevents an accidental push. In the file 'mongo.js', paste the URI you copied from mLab into it and replace the <dbuser> and <dbpassword>, including the brackets, with your username and password to that database.
Log in to Heroku and navigate to the settings page on your app. Set up automatic deployments from your master branch on the root folder. When you push to master, changes should automatically be made.
Enjoy!