Update app.py

app.py

@@ -1,4 +1,5 @@
 import os
+import signal
 import threading
 import time
 import subprocess
@@ -13,7 +14,7 @@ if not os.path.exists(OLLAMA):
 
 def ollama_service_thread():
     global process
-    process = subprocess.Popen("~/ollama serve", shell=True)
+    process = subprocess.Popen("~/ollama serve", shell=True, preexec_fn=os.setsid)
     process.wait()
     
 OLLAMA_SERVICE_THREAD = threading.Thread(target=ollama_service_thread)