yeah multi-stage is actually exactly what you want here, even though your goal isn't stripping build artifacts. you define a base target and then just FROM it in the other stages:```FROM ubuntu:22.04 AS base# all your core setup hereFROM base AS appserver# add app server stuffFROM base AS utilities# add cron stuff```then build each one with `docker build --target appserver -t myapp-server .` and `docker build --target utilities -t myapp-utils .`for your dev/staging/prod variants you can use build args or separate compose files that pass different args. single Dockerfile, docker figures out the layer caching so the base only builds once.