Start of works on frontend

static/js/loginpage.js

@@ -0,0 +1,9 @@
+async function handleLogin(event) {
+  event.preventDefault();
+  const username = document.getElementById("username").value;
+  const password = document.getElementById("password").value;
+  const result = await login(username, password);
+  if (result) {
+    window.location.href = "/";
+  }
+}