Drone 0.4 documentation is gone?

We’re running Drone 0.4 due to various tool dependencies and recently put together some doc that referenced a variety of pages at https://readme.drone.io/0.4/, but it seems like that doc is… gone? The dead links are breaking our doc repo’s build process, but more concerning is just that we can’t reference the doc any more. Has this moved to another URL? Is it archived anywhere accessible?

This commit updated the docs repo to 0.5, so perhaps you can find what you are looking for in the tree of the previous commit.