deploying a “one line of code”. What are the exact steps to deploy this?

deploying a “one line of code”. What are the exact steps to deploy this?

The "one line of code" is a simple script to implement for each domain/sub-domain you want to evaluate.
The script should be embedded in the beginning of the <head> section of the master page of each application and contain an "async" attribute to make it execute on load.