Configuration
All the configurations of the app are placed in the "Config" folder. There you will find the App.js file
Setup the Firebase DB
Best way will be to import mine JSON into your Firebase db, and edit it from there. Here you can get the JSON. https://gist.github.com/dimovdaniel/b350ad5ab7518b556a5c539669c3917e
Sendgrid
In order to accept your orders on email, you need to create Sendgrid account.( Free )
Go in Settings->API Keys to create new API key ( The api key shows only once ). Enter it in App.js around line 7.
Enter your email in App.js on line 10.
Receive orders in Slack
If you want to receive orders in Slack, create an account in Smooch. Then configure the email on line 10 in App.js with a email from Smooch.