We have docker(local/local network), test, uat, staging, internal and production. Internal works as production however their are not involved in release process, therefore everybody can use ex. Services without worries. Docker is our local env which can connect to others local machines. Staging biggest plus is to have mirror of all security and optimalization bits like redis, mem ache, opcache, cdn cache, firewall rules, network ip/hosts, load balancers and of course production env config which you never should check only on production.
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