[hobofan]

> `Dockerfile` from 10 years back would work today as well.

I highly doubt that any Dockerfile from back then would work if it runs `apt-get` (as many do), as the mirrors for the old distribution versions aren't online anymore.

Dockerfiles can be made to be quite deterministic, but many use `FROM` with unpinned tags and install from URLs that can and do go away.

[Vaguely2178]

Exactly! Dockerfiles are not deterministic. The build artifacts that they produce (images) are, but the same could be said of js build artifacts (which would be a set of compiled and bundled js files).