Provide a way to set the root context path

If a user wants to add a context path for all endpoints, he/she has to add the prefix string to all service setters which is tedious. If we provide a way to set the context path, it will be much easier:

Server.builder()
      .contextPath("/api")
      .service("/foo", myService) // myService binds to "/api/foo"
      ...

[vivekkothari]

Sure… i’lll try work on this over the next week.

[AngerM-DD]

Would it make sense to allow building ‘sub routers’? It may end up just being some syntactical sugar but it would be great to have something like:

val builder = Server.builder()
builder.<Add top level http functions>

val api = builder.subRouter("/api")
api.<Add your http handler functions that will get run under /api>

etc.