v0.2 -- docker and scanner and testing, oh my!

Not much functionality added to the API in this release, but lots of CI stuff has been added to this project including the following:

• Dockerfile added to repo for container deployment
• Automated container build on commit/PR
• Automated tests written and configured to run on commit/PR
• Automated security scanning via CodeQL on commit/PR

v0.1 -- initial release

Includes API calls for getting root CA cert and generating a new host certificate signed by the CA

Still need to implement revoking certificates before it is production-ready