Update app.py

Overhauled for new ChromaDB version

app.py

@@ -5,8 +5,8 @@ from chromadb.config import Settings
 
 from chromadb import PersistentClient
 
-client_db = PersistentClient(path="chromadb_directory")
-
+# Set the correct path to chroma.sqlite3 (according to the repo structure)
+client_db = PersistentClient(path="./chromadb_directory/chromadb_file/chroma.sqlite3")
 
 # Load your collection
 collection = client_db.get_collection("my_collection")