Converts port to str

app.py

@@ -10,7 +10,7 @@ from langchain.memory import ConversationTokenBufferMemory
 openai.api_key = os.environ['OPENAI_API_KEY']
 hf_api_key = os.environ['HF_API_KEY']
 host = os.environ['host']
-port = os.environ['port']
+port = str(os.environ['port'])
 database_name = os.environ['database_name']
 user = os.environ['user']
 passwd = os.environ['passwd']