bug(docker): Images built by GitHub Actions can't be used as cache

[Byloth]

For some strange and unknown reason (that I can't understand) images created by GitHub Actions can't actually be used as a cache for other subsequent builds. They're simply ignored even though the layers should be identical.

It doesn't matter if you're trying to use them in local development environments or in other GitHub Actions runners.
They're still ignored.

---

Just as it arrived, maybe it will go away on its own? Dunno.