Properly clone the plugin-site frontend into a subdirectory instead of on top of our existing code
Properly clone the plugin-site frontend into a subdirectory instead of on top of our existing code

`git` checks out into the "current directory" which means we were technically
builting just the node-only (plugin site frontend) container before

michaelmccaskill/plugin-site-api,michaelmccaskill/plugin-site-api