update

mysql/Dockerfile-mysql8

@@ -14,9 +14,8 @@ gpgcheck=0\n\
                     && dnf -y module disable mysql \
                     && dnf install mysql-community-server -y \
                     && rm -rf /usr/sbin/mysqld-debug \
-                        /var/cache/yum \
-                        /var/lib/yum \
-                        /var/lib/rpm \
+                        /var/cache/dnf \
+                        /var/lib/dnf \
                         /var/log/* \
                         /etc/my.cnf.d \
                     && mkdir -p /var/log/mysql \