Create 'visitor check-in' app

[vpetersson]

I was looking at a sample app from Dark, and they show how to make a simple visitor check-in app.

The process is pretty easy:

• Select an employee out of a drop down list (probably stored in an SQLite database, or just hard coded in MVP)
• Enter your name, email and phone number along with a message
• When the user press submit, two alerts are sent:
  • SMS via Twilio
  • DM on Slack