More descriptive login screen

frontend/index.js

@@ -1,4 +1,6 @@
 async function login() {
+    // tell the user the app is loading
+    document.getElementById("loginSubmit").value = "Loading";
     // this.preventDefault();
     // get login details
     let name = document.getElementById("name").value;
@@ -18,6 +20,8 @@ async function login() {
     // else switch screen
     if (response.status !== 200) {
         document.getElementById("loginSubmit").classList.add("error");
+        document.getElementById("loginSubmit").value = "Failed";
+        return;
     } else {
         // switch screen
         document.getElementById("login").setAttribute("style", "display: none;");