Update Dockerfile to use Arm64 compatible Swift base image

[pavlospt]

Hello,

We are using XCMetrics @ Blueground & we are transitioning to Arm64 for our production workloads. Since swift:5.5-bionic did not support Arm64 architecture, this was a blocker for us.

This PR updates the base Docker image to swift:5.6-focal in order to be compatible with Arm64.

Tested locally with the docker-compose-local.yml file! 🎉

[pavlospt]

Hey @ecamacho , is the Docker image release pipeline private? I am not seeing something related in Github workflows 🤔

[pavlospt]

@ecamacho hello again. I see that a new Docker image has been pushed to DockerHub, but unless the pipeline building it runs on Arm architecture, or you start building multiplatform images, it won't publish an Arm Docker image. Is there a way to start building for Arm too?

[ecamacho]

@pavlospt I see, let me take a look at the configuration to see if that can be done

[pavlospt]

@ecamacho I can also open a PR with a Github workflow building an Arm image if that's easier for you!

[ecamacho]

@pavlospt I don't have access yet to our Docker Hub configuration, someone else in my organization configured it. I've raised a request to be able to configure it. I'll keep you posted!

[pavlospt]

@ecamacho great news. Do you want to open an issue from your side in order to track it there, instead of this PR?

[ecamacho]

@pavlospt it's now working for the latest tag. You can find arm64 images in Docker hub:

I will create another workflow to create the images for explicit git tags as well next week

[pavlospt]

@ecamacho that's great! Thank you very much for the quick resolution!