* Increase [key_buffer_size](https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_key_buffer_size) given that the index file is way too big for the default value
* Also increase `read_buffer_size` to a [recommended value](https://dba.stackexchange.com/a/136409) of 256K
* More precise base image tag
## mysql8.picapatch1
* Limit the [mysql binary log](https://dev.mysql.com/doc/refman/8.0/en/binary-log.html) to 30 hours and some other custom configs in [config/binary_log.cnf](config/binary_log.cnf)
* Remove unnecessary tools (mainly, libsqlite3-0 and gpg)
This image limits the [mysql binary log](https://dev.mysql.com/doc/refman/8.0/en/binary-log.html) to 30 hours (=108000 seconds) via the [binlog_expire_logs_seconds](https://dev.mysql.com/doc/refman/8.0/en/replication-options-binary-log.html#sysvar_binlog_expire_logs_seconds) variable.