add the download code

app.py

@@ -1,18 +1,25 @@
 import subprocess
 import time
+from transformers import AutoModelForCausalLM
+
+def download_model():
+    model_name = "liuhaotian/llava-v1.5-7b"
+    AutoModelForCausalLM.from_pretrained(model_name, use_cache=True)
+    print(f"Model {model_name} downloaded successfully.")
 
 def start_controller():
     subprocess.Popen(['python', '-m', 'llava.serve.controller', '--host', '0.0.0.0', '--port', '10000'])
-    time.sleep(10)  # wait for the controller to start
+    time.sleep(60)  # wait for the controller to start
 
 def start_gradio_web_server():
     subprocess.Popen(['python', '-m', 'llava.serve.gradio_web_server', '--controller', 'http://localhost:10000', '--model-list-mode', 'reload'])
-    time.sleep(10)  # wait for the web server to start
+    time.sleep(60)  # wait for the web server to start
 
 def start_model_worker():
-    subprocess.Popen(['python', '-m', 'llava.serve.model_worker', '--host', '0.0.0.0', '--controller', 'http://localhost:10000', '--port', '40000', '--worker', 'http://localhost:40000', '--model-path', 'liuhaotian/llava-v1.5-13b'])
+    subprocess.Popen(['python', '-m', 'llava.serve.model_worker', '--host', '0.0.0.0', '--controller', 'http://localhost:10000', '--port', '40000', '--worker', 'http://localhost:40000', '--model-path', 'liuhaotian/llava-v1.5-7b'])
 
 if __name__ == "__main__":
+    download_model()  # Download first
     start_controller()  # Starts the controller process
     start_gradio_web_server()  # Starts the Gradio web server process
     start_model_worker()  # Starts the model worker process