add admin flash messaging and styles

test/controllers/recruiter_controller_test.rb

@@ -74,7 +74,7 @@ class RecruiterControllerTest < ActionDispatch::IntegrationTest
       end
     end
     assert_redirected_to recruiter_path
-    assert flash[:notice]
+    assert flash[:success]
   end
 
   test "should fail creation with message" do