feat: replace socket.io with websocket

Description

Replacing socket.io with web socket.

Related issues

Testing

Checklist

• I have updated the documentation (if necessary)
• I have added unit tests for new functionality (if applicable)
• My code follows the style guidelines of this project
• I have tested this code on my local machine before submitting this MR

Reviewers

• @alexey.lunin
• @boyan.tsolov

Additional Notes

Closes #22 (closed)

apps/gateway/src/app/app.controller.ts

@@ -26,7 +26,8 @@ export class AppController {
         2,
       )}`,
     );
-    this.eventsGateway.server.emit(this.gatewayConfig.socketEventName, dto);
+
+    this.eventsGateway.sentEvent(dto);
     return "ok";
   }
 }