gs-validate too restrictive on docker check

[thesnowdog]

Issue Description
I am running the docker image cbcrowe/pihole-unbound and my container name is pihole. When validating that pihole runs in docker, gs-validate.sh seems to only look for “pihole/pihole” in the docker ps output. When I manually change that part of the script to “cbcrowe/pihole-unbound”, then sync works. Consider looking only for “pihole” when grepping the docker ps output.

[vmstan]

So currently I have only been supporting the official Pi-hole container image. When I initially released it I didn't want to get bogged down with troubleshooting more than that. I still don't think I want this to be something I fully support yet, but I have added a variable called CONTAIMAGE which can be added in your gravity-sync.conf file. This will be available in 3.3.1 once I publish it.

CONTAIMAGE='cbcrowe/pihole-unbound'

Let me know if this works.

[thesnowdog]

Works! Thanks!