add NSFW checker and GPU mode

app.py

@@ -1,4 +1,5 @@
 import os
+import spaces
 import torch
 import random
 import numpy as np
@@ -17,7 +18,7 @@ from torchvision.utils import save_image
 import utils.ptp_utils as ptp_utils
 
 import torchvision.transforms as transforms
-import spaces
+
 
 try:
     import xformers