feat(server/admin): add new admin api router

internal/server/admin.go

@@ -0,0 +1,32 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package server
+
+import (
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/go-chi/render"
+)
+
+// adminRouter creates a router that represents the routes under /admin
+func adminRouter(s *Server) (chi.Router, error) {
+	r := chi.NewRouter()
+
+	r.Use(middleware.AllowContentType("application/json"))
+	r.Use(middleware.StripSlashes)
+	r.Use(render.SetContentType(render.ContentTypeJSON))
+
+	return r, nil
+}

internal/server/server.go

@@ -337,6 +337,11 @@ func NewServer(ctx context.Context, cfg ServerConfig) (*Server, error) {
 		}
 		r.Mount("/ui", webR)
 	}
+	adminR, err := adminRouter(s)
+	if err != nil {
+		return nil, err
+	}
+	r.Mount("/admin", adminR)
 	// default endpoint for validating server is running
 	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
 		_, _ = w.Write([]byte("🧰 Hello, World! 🧰"))