Add a Swagger doc page or reference it

https://github.com/Pseudonotes/labs/blob/cdc5975f6d75cd82db2e2747e54c6250f7be5bd6/auth-server/open-api-spec.yaml#L1

- Add the following resources which are important in a containerized environment.
- [ ] Actuator health endpoints.
- [ ] Swagger documentation UI.
- Api Keys