How to get rid of the following error: java.net.UnknownHostException in getHTTP Nifi (Nifi is running in Docker container)

[#1]

java.net.UnknownHostException

[#2]

Looks like this is being handled/answered in a different but related question:

https://community.hortonworks.com/questions/177353/i-am-a-newbie-in-nifi-i-am-using-nifi-in-docker-h...