Add functions default code w/ helloWorld

functions/src/index.ts

@@ -0,0 +1,9 @@
+import * as functions from "firebase-functions";
+
+// // Start writing Firebase Functions
+// // https://firebase.google.com/docs/functions/typescript
+
+export const helloWorld = functions.https.onRequest((request, response) => {
+  functions.logger.info("Hello logs!", {structuredData: true});
+  response.send("Hello from Firebase!");
+});