Add config option for ContainerConfigRoot #1691

Job	Run time
variables	2s
golang / check	43s
code-scanning / Analyze Go code with CodeQL	1m 42s
golang / Build	23s
golang / Unit test	57s
image / packages (ubuntu18.04-amd64, true)	3m 30s
image / packages (centos7-x86_64, true)	3m 29s
image / image (packaging)	1m 5s
image / image (application)	1m 47s
e2e-test / e2e-tests (true, 535)	21m 55s
	35m 33s

Provide feedback