Missing instructions on how to get the app running

[Mark O'Sullivan]

For anyone wanting to clone the repo and run the app, there is no README instructions for them to follow

Please update the README with step by step instructions on how to generate google-services.json along with any other information required to clone the behaviour of the app on the stores

[Mais Alheraki]

Hi @MarkOSullivan94! Check the new README, let me know if you face any issues setting up the app.