leejinwoo1126's honest review, Learn MySQL on Docker by following along course

I was personally curious about db replication, and it was good to learn about proxy sql and monitoring tool integration. I don't really understand docker swarm, (Is it about creating and managing worker nodes on the manager node server?) and I didn't need it right away, so I just listened to it and moved on, but I think it might be conceptually helpful someday.

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