beacon: explicit serve.js entrypoint for pm2/production

pm2 launches scripts through its own wrapper, so server.js's
import.meta.url main-guard never fires and startServer() is never called
(process stays up but binds nothing). serve.js imports and calls
startServer() unconditionally — robust under pm2, systemd, or direct node.

Author: melvincarvalho

serve.js

@@ -0,0 +1,14 @@
+// Production entrypoint: start the read-only beacon HTTP server.
+//
+// pm2's launcher does not trigger server.js's `import.meta.url === main`
+// guard (it runs the file through its own wrapper), so starting src/server.js
+// directly under pm2 loads the module but never calls startServer(). This
+// explicit entry guarantees the server boots under any launcher.
+//
+//   PORT=3001 MONGO_DB=nostr pm2 start serve.js --name beacon
+import { startServer } from './src/server.js';
+
+startServer().catch((e) => {
+  console.error('[beacon] failed to start:', e);
+  process.exit(1);
+});