Update the start worker and add sleep

app.py

@@ -759,7 +759,7 @@ def start_controller():
     return subprocess.Popen(controller_command)
 
 def start_worker():
-    subprocess.Popen(['python', '-m', 'llava.serve.model_worker', '--host', '0.0.0.0', '--controller', 'http://localhost:10000', '--model-path', 'liuhaotian/llava-v1.5-7b'])
+    return subprocess.Popen(['python', '-m', 'llava.serve.model_worker', '--host', '0.0.0.0', '--controller', 'http://localhost:10000', '--model-path', 'liuhaotian/llava-v1.5-7b'])
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
@@ -781,6 +781,7 @@ def start_worker():
 
     worker_proc = start_worker()
 
+    time.sleep(60)
     try:
         start_demo(args)
     except Exception as e: