administrator dashboard for observing the Docker container pool

app/controllers/admin/dashboard_controller.rb

@@ -0,0 +1,17 @@
+module Admin
+  class DashboardController < ApplicationController
+    include DashboardHelper
+
+    def policy_class
+      DashboardPolicy
+    end
+
+    def show
+      authorize(self)
+      respond_to do |format|
+        format.html
+        format.json { render(json: dashboard_data) }
+      end
+    end
+  end
+end