[golangci-lint]: check err for file.Close()

parseconfig.go

@@ -142,7 +142,10 @@ func parseConfig(configPath string) (configuration, error) {
 			}
 		}
 	}
-	file.Close()
+	err = file.Close()
+	if err != nil {
+		fmt.Println("error closing file:", err)
+	}
 
 	// Check if the username is a valid JID
 	output.username, err = MarshalJID(output.username)