The ideas behind 12 factor principles are pretty solid, however Im no longer sold on them as being the one and only way, in other words, sometimes your company

The ideas behind 12 factor principles are pretty solid, however Im no longer sold on them as being the one and only way, in other words, sometimes your company setup might be better supported with alternative opinions (e.g. context rich logging, smart frontend routing - e.g. exploiting haproxy/nginx directives rather than dumb proxy forwarding). I guess this was contributing reason I didnt take openruko forward (although some others did). It is great there are supported/maintained heroku like implementations such as dokku/flynn but it might not be ideal or compatible with your style of devops. I guess my advice would be to take inspirations from these systems but ultimately you have weigh up if its a good fit.