Library-only gem support in fork

[nscott]

In case anyone is still using this repo, I have a Ruby v3.2, OpenSSLv3 version which has been stripped down to just the gem in https://github.com/hellodocket/health_cards

With rails included this repo has 120+ dependency vulnerabilities. I assume most folks are only using the gem this repo builds, so this eliminates a lot of the cruft.

Looks like the two PRs that were opened over a year ago are dead in the water.

Just trying to provide a simpler alternative.