Canvas kit.

client/web/flutter_bootstrap.js

@@ -0,0 +1,11 @@
+{{flutter_js}}
+{{flutter_build_config}}
+
+_flutter.loader.load({
+  onEntrypointLoaded: async function(engineInitializer) {
+    const appRunner = await engineInitializer.initializeEngine({
+      canvasKitBaseUrl: 'canvaskit/',
+    });
+    await appRunner.runApp();
+  }
+});