Update app.py

app.py

@@ -43,7 +43,7 @@ else:
     print("Error executing command:")
     print(cmd4.stderr)
 sleep(5)
-cmd5 = subprocess.run("apt-get install -y libfontconfig1", shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+cmd5 = subprocess.run("apt-get install -y libfontconfig1 libnss3", shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
 if cmd5.returncode == 0:
     print("Command output:")
     print(cmd5.stdout)