Implement rootless docker in dev

[amyfou]

• [x] review the development yaml and docker files and make sure you understand what's happening in each;
• [x] read up on rootless docker
• [x] revise the development yaml and docker files to implement rootless docker
• [x] report points of failure if any or report success

[amyfou]

Success! Currently pushed to branch 'rootless' if anyone else wants to give this a try.

[amyfou]

So this might be close-able but not without additional testing in other environments.

Also, need to see if the production build will work rootless.

[amyfou]

I need to document the process as well.