Add details in the README about testing the whole setup

[raul1991]

Before we get testcases in place, there should be a section describing the steps to setup the e2e thing in Monito.

Example section

Testing

• Run the script and the python server
• Since the ping script updates the machine mapping with the users on the machine, you need to do this manually to trigger trespassing emails.
• For allocation emails, you can click assign me button in the gui.

For email setup

• Create .env file in the root of the repo with the following keys
• USE_GMAIL=true
• GMAIL_CREDS="base64-of-your-gmailid:password"
• Also, turn on insecure apps in your gmail account so you can use it to send emails - here is the link https://myaccount.google.com/lesssecureapps

Add as much information as you can add.