kojiapi: prefix all routes with /api/composer-koji/v1

The cloud API will be moved to `/api/composer/v1` in the future.

Mention this in the `servers` section of the openapi.yml (relative URLs
are allowed) too, even though our generator does not consider it.

internal/kojiapi/api/api.go

@@ -1,3 +1,5 @@
 //go:generate go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen -package=api -generate types,server -o api.gen.go openapi.yml
 
 package api
+
+const BasePath = "/api/composer-koji/v1"

internal/kojiapi/api/openapi.yml

@@ -1,11 +1,13 @@
 openapi: 3.0.1
 info:
-  version: '1'
   title: OSBuild Composer - Koji
+  version: '1'
   description: Service to build and push images to Koji.
   license:
     name: Apache 2.0
     url: 'https://www.apache.org/licenses/LICENSE-2.0.html'
+servers:
+  - url: /api/composer-koji/v1
 paths:
   /status:
     get:

internal/kojiapi/server.go

@@ -44,7 +44,7 @@ func NewServer(logger *log.Logger, workers *worker.Server, rpmMetadata rpmmd.RPM
 	e.Binder = binder{}
 	e.StdLogger = logger
 
-	api.RegisterHandlers(e, &apiHandlers{s})
+	api.RegisterHandlers(e.Group(api.BasePath), &apiHandlers{s})
 
 	s.server = &http.Server{
 		ErrorLog: logger,