maybe fix paths for import

app.py

@@ -54,12 +54,16 @@ def main():
     '''
 
     def convert_to_ply(input_point_cloud_upload: str):
-        print(subprocess.check_output(['ls', '-l']))
 
+        # add absolute path to import dirs
+        import sys
         import os
-        os.chdir(os.path.dirname('./ppsurf'))
+        sys.path.append(os.path.abspath('ppsurf'))
 
-        print(subprocess.check_output(['ls', '-l']))
+        print('before\n', subprocess.check_output('ls'))
+        import os
+        os.chdir('ppsurf')
+        print('after\n', subprocess.check_output('ls'))
 
         print('Inputs:', input_point_cloud_upload)
         input_shape = input_point_cloud_upload