fix(mariadb): fix mariadb is not booting issue

1. fix mariadb is not booting issue

mariadb/Dockerfile

@@ -14,6 +14,6 @@ COPY my.cnf /etc/mysql/conf.d/my.cnf
 
 RUN chmod -R 644 /etc/mysql/conf.d/my.cnf
 
-CMD ["mysqld"]
+CMD ["mariadbd"]
 
 EXPOSE 3306