boilerplate for tutorial + minirepl

repl/src/tutorial/index.html

@@ -0,0 +1,14 @@
+<div id="root"></div>
+<script type="module">
+  import React from 'react';
+  import ReactDOM from 'react-dom';
+  import * as React from 'react';
+  import Tutorial from './tutorial.mdx';
+
+  ReactDOM.render(
+    <React.StrictMode>
+      <Tutorial />
+    </React.StrictMode>,
+    document.getElementById('root')
+  );
+</script>