Move rollups docker packaging from QEMU

📄 Context

We have been using QEMU to generate our rollups docker image. Previously it was only generating the images using the Linux/amd64 architecture, and the times were reasonable, around 6 minutes without intermittent connectivity problems. Once we included the Linux/arm64, though, the timing for that generation alone is around 26 minutes, and we often see network connectivity problems (screenshot below) naturally followed by CI failure because it usually never recovers that connection. Therefore, we are looking for an alternative to solve that problem and avoid the workaround, that is, to rerun it 🫠.

✔️ Solution

Initially, move from QEMU to depot.dev, which is specialised in building docker images. PS: funny enough, the example on the main page is showing how fast it is to build something on arm64

Reference: Sunodo CLI Action

📈 Subtasks

[x] Create a DEPOT_PROJECT for rollups-explorer on depot.dev.
[x] Add the DEPOT_PROJECT in the repository vars config to be available to the GitHub action.
[x] Update permissions in the docker-rollups.yml including id-token: write to be able to request JWT token.
[x] Add setup steps to integrate with depot.dev

🎯 Definition of Done

[x] The intermittent CI connectivity failure is solved
[x] rollups-explorer images are published to the GitHub Registry a.k.a packages.

cartesi / explorer