remove separate ui service, serve ui with backend

ui/nightwatch/nightwatch.d.ts

@@ -0,0 +1,13 @@
+import { NightwatchCustomAssertions, NightwatchCustomCommands } from 'nightwatch'
+
+declare module 'nightwatch' {
+  interface NightwatchCustomAssertions {
+    // Add your custom assertions' types here
+    // elementHasCount: (selector: string, count: number) => NightwatchBrowser
+  }
+
+  interface NightwatchCustomCommands {
+    // Add your custom commands' types here
+    // strictClick: (selector: string) => NightwatchBrowser
+  }
+}