Add the static assets directory and serve it.

src/assets/main.css

@@ -1,2 +0,0 @@
-/* Do something */
-

src/index.tsx

@@ -29,7 +29,12 @@ app.get(
   )
 );
 
-app.get('/static/*', serveStatic({ root: "./assets/" }));
+app.use('/static/*', serveStatic({
+  root: '/src/assets',
+  onNotFound: (path, c) => {
+    console.error(`${path} is not found; Trying to access ${c.req.path}`);
+  }
+}));
 
 console.log(JSON.stringify({ message: "Bootstrapping the routes..." }));
 app.route('/', home);