add test quadlets

quadlets/db.container

@@ -0,0 +1,14 @@
+[Container]
+Environment=MYSQL_ROOT_PASSWORD=somewordpress MYSQL_DATABASE=wordpress MYSQL_USER=wordpress MYSQL_PASSWORD=wordpress
+Exec="--default-authentication-plugin=mysql_native_password"
+ExposeHostPort=3306
+ExposeHostPort=33060
+Image=mariadb:10.6.4-focal
+Network=wp.network
+Volume=db_data:/var/lib/mysql
+
+[Service]
+Restart=always
+
+[Install]
+WantedBy=default.target