Update app.py

app.py

@@ -1,6 +1,10 @@
-import os
+import os, shutil
+from git import Repo
 token = os.getenv("githubpublictoken")
 
-from git import Repo
-Repo.clone_from("https://zubairahmed-ai:"+ token +"@github.com/zubairahmed-ai/IndexFilesWithGPT.git", 
-    "/repo_directory")
+currentpath = "repo_directory"
+if os.path.exists(currentpath):
+  shutil.rmtree(currentpath)
+  os.mkdir(currentpath)
+
+Repo.clone_from("https://zubairahmed-ai:"+ token +"@github.com/zubairahmed-ai/IndexFilesWithGPT.git", currentpath)