Environment variables definitions for the Covid-19 Screening Interface Github module

Hello All,
I am new to Apperta. Just signed up.
I am trying to run the docker containers for the Covid-19 Screening Interface module at Github:


In docker-compose.yml, there is a list of environment variables. But in the above URL, there is no .env file for these variables. Can someone please tell me where I can get this .env file or able to tell me what the values for these environment variables should be?

Thanks in advance.
John