Improve artifact version control

[corrideat]

Problem

We're currently tracking build artifacts (i.e., the build directory). This causes issues with, e.g., merge conflicts.

Solution

Think of another way of tracking artifacts. Some alternatives:

1. If we can have truly reproducible builds, perhaps we don't need this.
2. An alternative is having artifacts in a separate branch, which is updated when a release is made.
3. Some other option