I do this constantly. undefined: not retrieved yet. null: Error when retrieving. Makes it easy to reason about what the current state of the data is without the need for additional status flags.
I just put my docker services in a lxc container. Docker is neat and lets me deploy shit without having to worry. Works pretty well, just remember to put your lxc containers on your SSD and not your raid mass storage (my hdds have errors now, fuck)
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