Deploy needs some improvement

[felipefarias]

Everytime that we build, s3sync push all again.

The problem is not on s3sync. The problem is in the fact that the build is not deterministic.

[dennys-bd]

I think that the build shouldn't be deterministic.
We only build minors, but old versions may have patches

[dennys-bd]

We could just set --skip-existing on the deploy, but not sure how it would work with rewrites

another option is to remove --delete-removed and only build what we want to replace, this way we could remove support to old versions and yet they would be there in the site