Idea: upload binaries from CI runs

[hannesm]

We use cirrus CI a lot to build our unikernels. We should there use orb and upload the results to builder-web.

For builder-web, I suspect it'd be good to have Bearer authentication in place.

For the cirrus jobs, we'll need to store the secrets somewhere (and figure out how to do so). Also, we will need to use orb to build the package (and eventually builder for packing it up), and then uploading it to builds.robur.coop.

[reynir]

Hmm. I guess in order to build unikernels we would need to run mirage configure first to get an opam file that we can feed to orb? And then somehow orb needs to know how to get the source. I think it is an interesting idea, and worth exploring.

[hannesm]

right. maybe we would need to tweak orb so it runs the mirage configure or we'd do a multi-step approach, and first install mirage and then later orb. given that we can run orb with an existing opam switch (or at least there was a time where we were able to - we may need to reactivate this), I guess that's fine. :)