Change default value of dns_server and mention that it has to be an IP

src/ddns_service/config.py

@@ -145,7 +145,7 @@ def load_config(config_path):
     cfg["database"].setdefault("backend", "sqlite")
 
     cfg.setdefault("dns_service", {})
-    cfg["dns_service"].setdefault("dns_server", "localhost")
+    cfg["dns_service"].setdefault("dns_server", "127.0.0.1")
     cfg["dns_service"].setdefault("dns_port", 53)
     cfg["dns_service"].setdefault("dns_timeout", 5)
     cfg["dns_service"].setdefault("cleanup_interval", 60)

src/ddns_service/models.py

@@ -81,7 +81,7 @@ def init_database(config: dict):
         logging.info(f"Database backend: SQLite path={db_path}")
 
     elif backend == "mariadb":
-        new_db = MySQLDatabase(
+        db = MySQLDatabase(
             config["database"]["database"],
             host=config["database"].get("host", "localhost"),
             port=config["database"].get("port", 3306),
@@ -89,10 +89,8 @@ def init_database(config: dict):
             password=config["database"]["password"],
         )
         # Re-bind models to new database
-        User._meta.database = new_db
-        Hostname._meta.database = new_db
-        # Replace global db reference
-        db = new_db
+        User._meta.database = db
+        Hostname._meta.database = db
         logging.info(f"Database backend: MariaDB db={config['database']['database']}")
 
     else: