updated frontend from typescript to javascript

src/App.vue

@@ -1,3 +1,27 @@
 <template>
-  <router-view/>
+  <header>
+    <Nav/>
+  </header>
+  <main>
+    <div class="spacer bg-secondary"></div>
+    <router-view/>
+  </main>
+  <footer>
+    <Footer />
+  </footer>
 </template>
+
+<script>
+import Nav from "@/components/Nav";
+import Footer from "@/components/Footer";
+
+export default {
+  components: {Footer, Nav},
+}
+</script>
+
+<style>
+.spacer {
+  height: 70px;
+}
+</style>