Fix router warnings

Author: JanisV

frontend/src/router/index.js

@@ -4,30 +4,37 @@ const routes = [
   {
     path: '/',
     name: 'home',
+    component: { render: () => null },
   },
   {
     path: '/coin/:id',
     name: 'coin',
+    component: { render: () => null },
   },
   {
     path: '/images/:id',
     name: 'images',
+    component: { render: () => null },
   },
   {
     path: '/open',
     name: 'open',
+    component: { render: () => null },
   },
   {
     path: '/settings',
     name: 'settings',
+    component: { render: () => null },
   },
   {
     path: '/summary',
     name: 'summary',
+    component: { render: () => null },
   },
   {
     path: '/about',
     name: 'about',
+    component: { render: () => null },
   },
 ]