added super basic JWT mockups

src/lib/Login.svelte

@@ -1,6 +1,14 @@
 <script>
+  import Cookies from "js-cookie";
   async function login() {
-    alert("login");
+    const response = await fetch("/api/auth", { method: "POST" });
+    if (!response.ok) {
+      alert("Login failed");
+    } else {
+      let { token } = await response.json();
+      Cookies.set("token", token);
+      alert(`Login Success: ${token}`);
+    }
   }
 </script>