Add dummy data adder

[reid-moffat]

Add a button on front-end (put it out of the way, like profile screen) that when pressed:

• Gets the dummy data JSON (#10)
• Sends all the dummy data to a API endpoint you made
• The endpoint deletes all data in the events/ database collection
• These dummy event objects are added to the database in the events/ collection

This is done on front-end because it's much easier to manage this way than backend