high level readme clarification

[ek-nyc]

Create a service account credential and download the JSON file
Create a GCP compute instance
Open firewall rules (ingress) in GCP for ports 8088 and 8089 for this instance. Click into the network interface for your compute instance.
Install python3 (if python3 not already installed), clone this github repo on to the host
Configure the FinishedSampleCode/settings.cfg and FinishedSampleCode/gcpcreds.json to have the Atlas connection string and GCP credentials from the service account downloaded JSON file
Install any python requirements by running sudo python3 -m pip install -r FinishedSampleCode/requirements.txt