Updated dark theme of app

frontend/src/App.js

@@ -10,7 +10,7 @@ import ViewPost from './components/Pages/ViewPost/ViewPost.js';
 import AddPost from './components/Pages/AddPost/AddPost.js';
 import Auth from './components/Auth/Auth.js';
 import { AuthProvider } from './context/auth.js';
-import AuthRoute from './util/AuthRoute.js';
+import AuthRoute from './components/AuthRoute/AuthRoute.js';
 
 const httpLink = createHttpLink({
   uri: 'http://localhost:5000/graphql'

frontend/src/styles.js

+import { createMuiTheme } from '@material-ui/core/styles';
+
+export const darkTheme = createMuiTheme({
+  palette: {
+    type: 'dark',
+    primary: {
+      main: '#64b5f6',
+    },
+  }
+});
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