Add section to README.md explaining how to run the app

[msabramo]

It would be fantastic to have setup instructions for how to get this app running.

Write instructions a human can follow to set up all the dependencies and get things running.

Huge points for providing Azure Bicep and/or Terraform files that do the stuff!

[msabramo]

Wow, @Copilot is super cool!

[msabramo]

I'm a little surprised that mentioning Copilot (@Copilot) doesn't work, but maybe exposing it like that would be ripe for abuse.