static folder creation line added

preprocess.py

@@ -34,7 +34,8 @@ def save_output(image_name, output_name, pred, d_dir, type):
 
 # Remove Background From Image (Generate Mask, and Final Results)
 def removeBg(imagePath):
-    os.mkdir('static')
+    if not os.path.exists('static'):
+        os.mkdir('static')
     inputs_dir = os.path.join(currentDir, 'static/inputs/')
     results_dir = os.path.join(currentDir, 'static/results/')
     masks_dir = os.path.join(currentDir, 'static/masks/')