feat:

--Added Read Registered nodes API
	--Added DEL unregister Node

database.py

@@ -1,7 +1,23 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, declarative_base
+import os
+from dotenv import load_dotenv
 
-DATABASE_URL = "postgresql://postgres:postgres@172.16.10.178:5444/postgres"
+
+load_dotenv()
+
+DB_HOST = os.getenv("DB_HOST")
+DB_PORT = os.getenv("DB_PORT")
+DB_NAME = os.getenv("DB_NAME")
+DB_USER = os.getenv("DB_USER")
+DB_PASSWORD = os.getenv("DB_PASSWORD")
+
+DATABASE_URL = (
+    f"postgresql://{DB_USER}:{DB_PASSWORD}"
+    f"@{DB_HOST}:{DB_PORT}/{DB_NAME}"
+)
+
+# DATABASE_URL = "postgresql://postgres:postgres@172.16.10.178:5444/postgres"
 
 engine = create_engine(
     DATABASE_URL,