docker inspect and jq

While using kamal, some of my mounts weren't working as expected. Search engines were a little bit unhelpful in determining what was going on, and I muddled my way through. I'm posting this in hopes that it makes search engines more helpful for future-me or future-someone-like-me. More seasoned docker veterans probably wouldn&rsquo;t have needed to turn to a web search to figure this out, but…