Change my-mysql-network placeholder to hostname (#469)
Change my-mysql-network placeholder to hostname (#469)

my-mysql-network is the wrong placeholder. This should be the hostname as in the Build section at the top

Signed-off-by: Kosmas Chatzimichalis <45a68dd2ff21b029c89be752dd6ce3827f11ab29@mach7x.com>
prometheus/mysqld_exporter,roman-vynar/mysqld_exporter,roman-vynar/mysqld_exporter,prometheus/mysqld_exporter