Dockerizing `mockoidc` for Integration Testing

[BenjamenMeyer]

I have been working on some functionality for mockoidc that would enable it to run under Docker for testing with multiple services. The core functionality breaks down into the following:

• an authorization service service implementation that demonstrates a basic (very basic) system (root requiring valid JWT to access, login endpoint with basic auth via HTTP Request FormPost, and OIDC integration hooks to interact with mockoidc)
• a manager interface for managing the authorization service instance and mockoidc instance (start, stop, load config)
• a manager command-line tool for running the manager inside of docker with a JSON configuration files to load from (may be future take some settings from a HTTP request body for the commands)
• the parts also expose a basic unauthenticated ping endpoint for system health
• a client command-line tool for showing how to interact with it (take issuer URL and show the Well-Known OIDC Config; start/stop services, load config, access ping)

NOTE: I did need to expose the discoveryResponse type to DRY it and make sure the client saw the same thing.

This would effectively demonstrate #52 and likely #53 in the process, and make this project useful to those wanting to proof their JWT auth methodology in a Dockerized environment.

Any feedback would be appreciated. Looking to contribute this work at some point here in the future.