Update app.py

app.py

@@ -23,7 +23,9 @@ app.secret_key = os.urandom(24)
 UPLOAD_FOLDER = "uploads/"
 VECTOR_DB_FOLDER = "VectorDB/"
 NLTK_FOLDER = "nltk_data/"
+
 app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
+os.environ["MPLCONFIGDIR"] = "/tmp"
 os.makedirs(UPLOAD_FOLDER, exist_ok=True)
 os.makedirs(VECTOR_DB_FOLDER, exist_ok=True)
 os.makedirs(NLTK_FOLDER, exist_ok=True)