TODO

mariadb ~> mariadb gallery
Review all config files, make them extern?
Make backend and frontend networks, 
Upgrade nginx configs, use sites etc, upgrade conf.d
Make doc to run cand maintaince
Delete folder with admin accout
fix mess with ports
An IP should be allocated from the upper part of the pool.
docker swarm

Redis
WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. Being disabled, it can can also cause failures without low memory condition, see https://github.com/jemalloc/jemalloc/issues/1328. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.