module(wp): attempt for local unix socket connection

modules/web-apps/wordpress/default-app-config.nix

@@ -44,9 +44,9 @@ in lib.makeExtensible (self: {
   dbConfig = lib.makeExtensible (innerSelf: {
     isLocal     = true; # if `true`, MySQL will be installed on the server.
     name        = "wordpress";  # database name
-    user        = "root";
+    user        = "wordpress";
     password    = "";
-    host        = "localhost";
+    host        = "localhost:/var/run/mysqld/mysqld.sock";
     charset     = "utf8mb4";
     tablePrefix = "wp_";
   });

modules/web-apps/wordpress/wp-config.nix

@@ -10,8 +10,6 @@
   ${secrets}
 
   define('DB_NAME',     '${dbConfig.name}');
-  define('DB_USER',     '${dbConfig.user}');
-  define('DB_PASSWORD', '${dbConfig.password}');
   define('DB_HOST',     '${dbConfig.host}');
   define('DB_CHARSET',  '${dbConfig.charset}');
   $table_prefix = '${dbConfig.tablePrefix}';