feat(core): Improve health check (#6205)

* remove unnecesary Db re-initialization

this is from before we added `Db.init` in `WorkflowRunnerProcess`

* feat(core): Improved health check

* make health check not care about DB connections

* close DB connections, and shutdown the timer

packages/cli/src/commands/webhook.ts

@@ -16,6 +16,8 @@ export class Webhook extends BaseCommand {
 		help: flags.help({ char: 'h' }),
 	};
 
+	protected server = new WebhookServer();
+
 	/**
 	 * Stops n8n in a graceful way.
 	 * Make for example sure that all the webhooks from third party services
@@ -81,7 +83,7 @@ export class Webhook extends BaseCommand {
 
 	async run() {
 		await Container.get(Queue).init();
-		await new WebhookServer().start();
+		await this.server.start();
 		this.logger.info('Webhook listener waiting for requests.');
 
 		// Make sure that the process does not close