Add simple (and bad) frontend

static/index.html

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <link rel="stylesheet" href="./jon.css">
+</head>
+<body>
+  <div class="jon-elm"></div>
+  <!-- Compiled by Elm -->
+  <script src="./jon.js"></script>
+  <script>
+    Elm.Main.init({ node: document.querySelector('.jon-elm') });
+  </script>
+</body>
+</html>