message: update collation and charset
diff: @@ -9,8 +9,8 @@ socket = /run/mysqld/mysqld.sock
  [mysqld]
  port = 3306
  socket = /run/mysqld/mysqld.sock
  -character_set_server = utf8
  -collation_server = utf8_bin
  +character_set_server = utf8mb4
  +collation_server = utf8mb4_bin
  expire_logs_days = 10
  ignore_db_dirs=backup
  innodb_buffer_pool_size = 256M
  