add log line at worker startup

app/workers/sample-worker.js

@@ -77,8 +77,11 @@ class SampleWorker extends SiteWorker {
 (async ( ) => {
   try {
     module.log = new SiteLog(module, module.config.component);
+
     module.worker = new SampleWorker(module);
     await module.worker.start();
+
+    module.log.info(`${module.pkg.name} v${module.pkg.version} ${module.config.component.name} started`);
   } catch (error) {
     module.log.error('failed to start worker', {
       component: module.config.component,