Build app just once in multi-server environment

Envoyer is great but I see a big misconception in multi-server deployment.

Let's assume that I have 8 application servers. That means that I update composer, install npm deps, build everything an that's all on each machine, 8 times. This isn't cool.

I wonder how it would be correct in terms of Envoyer workflow (if possible) to make this once and copy code between nodes?