fix: index bootstrap was gitignored

apps/nativescript-hello-world/.gitignore

@@ -7,6 +7,7 @@ platforms/
 *.js.map
 *.js
 !webpack.config.js
+!src/index.js
 
 # Logs
 logs

apps/nativescript-hello-world/src/index.js

@@ -0,0 +1,14 @@
+import { Application } from "@nativescript/core";
+import { render } from "@nativescript-community/solid-js";
+import { App } from "./app";
+import { document } from "dominative";
+
+document.body.actionBarHidden = true;
+document.body.appendChild(document.createElement("ContentView"));
+
+render(App, document.body.firstElementChild);
+
+const create = () => document;
+
+Application.run({ create });
+