Revised pgvector connection

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 = str(os.environ['port'])
+port = os.environ['port']
 database_name = os.environ['database_name']
 user = os.environ['user']
 passwd = os.environ['passwd']
@@ -23,11 +23,11 @@ embedding = OpenAIEmbeddings()
 
 CONNECTION_STRING = PGVector.connection_string_from_db_params(
     driver=os.environ.get("PGVECTOR_DRIVER", "psycopg2"),
-    host=os.environ.get("PGVECTOR_HOST", host),
-    port=int(os.environ.get("PGVECTOR_PORT", port)),
-    database=os.environ.get("PGVECTOR_DATABASE", database_name),
-    user=os.environ.get("PGVECTOR_USER", user),
-    password=os.environ.get("PGVECTOR_PASSWORD", passwd),
+    host=host
+    port=int(port),
+    database=database_name,
+    user=user,
+    password=passwd,
 )
 
 vectordb = PGVector(embedding_function=embedding,