Scaffold hatchet worker service

src/worker.js

@@ -0,0 +1,17 @@
+import 'dotenv/config';
+
+const requiredEnv = [
+  'HATCHET_CLIENT_HOST_PORT',
+];
+
+const missing = requiredEnv.filter((name) => !process.env[name]);
+if (missing.length > 0) {
+  throw new Error(`Missing required env vars: ${missing.join(', ')}`);
+}
+
+console.log('fregat-hatchet-worker started');
+console.log(`Hatchet endpoint: ${process.env.HATCHET_CLIENT_HOST_PORT}`);
+
+setInterval(() => {
+  console.log('worker heartbeat');
+}, 60_000);