Split maintenance duties from notifier

src/maintenance-main.ts

@@ -0,0 +1,16 @@
+import { NestFactory } from '@nestjs/core';
+
+import { MaintenanceModule } from './maintenance.module';
+
+async function bootstrap(): Promise<void> {
+    process.env.MASTER = 'true';
+    process.env.API_ENABLED = 'false';
+
+    const application = await NestFactory.createApplicationContext(
+        MaintenanceModule,
+    );
+    application.enableShutdownHooks();
+    console.log('Maintenance services started');
+}
+
+void bootstrap();