https://github.com/thehcginstitute-com/167.71.186.128/issues/29

etc/mysql/my.cnf

@@ -28,6 +28,8 @@ bind-address = 127.0.0.1
 # 1.3) «The default binary log expiration period is 2592000 seconds, which equals 30 days (30*24*60*60 seconds).»:
 # https://dev.mysql.com/doc/refman/8.4/en/replication-options-binary-log.html#sysvar_binlog_expire_logs_seconds
 # 1.4) I set it to 10 days (10*24*60*60 seconds) as I had `expire_logs_days = 10` before.
+# 1.5) `binlog_expire_logs_seconds` does not exist in MySQL < 8:
+# https://dev.mysql.com/doc/refman/5.7/en/replication-options-binary-log.html
 binlog_expire_logs_seconds = 864000
 default-storage-engine = INNODB
 # 2017-04-30 Важно! Чтобы Magento искала по двубуквенным запросам.