shell-things/etc/mysql/conf.d/unicode.cnf

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4

[mysqld]
init-connect='SET NAMES utf8mb4'
character-set-client-handshake = FALSE
character-set-server=utf8mb4
collation-server = utf8mb4_unicode_ci