Moving cleanup to dramatically reduce image size

[roelvanhintum]

Description

Moving cleanup to the same RUN as install and build reduces image size. Right now the cleanup is a separate RUN command in the docker files. At the end of a RUN command a new layer is created. Doing cleanup in a later layer does nothing for the resulting docker image.

Steps to reproduce

1. Build current docker image
2. Move cleanup command (for example https://github.com/craftcms/docker/blob/main/8.2/Dockerfile#L116) to the same step where the installs are performed.
3. Optionally move MozJPEG to a separate build stage
4. Build image again to compare to previous one

Additional info

• craftcms/cms version: -
• PHP version: -
• Database driver & version: -
• Plugins & versions: -

[linear[bot]]

PT-1644 Moving cleanup to dramatically reduce image size

[timkelty]

@roelvanhintum Please see https://github.com/craftcms/docker/issues/93

[roelvanhintum]

@timkelty Thanks! Regardless of that, it would still be a huge improvement. Maybe this is also the case in the new images? We made our own version, based upon the images here but without imagick, resulting in 197MB vs craftcms/nginx:8.2 931MB

[timkelty]

@roelvanhintum agreed! We're happy to accept a PR, or if we get the time before we officially read-only this repo, it seems worthwhile.

I'm going to leave this open for now.

Pinging @jasonmccallister to make any cleanup is happening in the appropriate layers in the new images.

[jawys]

@roelvanhintum @timkelty see #41