[factory web ui] check if it's possible to use api instead of shelling out to build container image

[mauromorales]

          Maybe this is for the future, but cant we just hook into the containerd libs here and create the image in pure go directly?

Originally posted by @Itxaka in https://github.com/kairos-io/AuroraBoot/pull/211#discussion_r1998250569

[github-actions[bot]]

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[jimmykarily]

Two more options (that can be used as libraries):

• buildah: https://github.com/containers/buildah
• kaniko: https://github.com/GoogleContainerTools/kaniko/

Though kaniko has a warning in their README:

kaniko is meant to be run as an image: gcr.io/kaniko-project/executor. We do not recommend running the kaniko executor binary in another image, as it might not work as you expect - see [Known Issues](https://github.com/GoogleContainerTools/kaniko/#known-issues).

(Also considered in the past here: https://github.com/kairos-io/kairos/issues/1546)

[jimmykarily]

This ticket and https://github.com/kairos-io/kairos/issues/1546 can probably be merged into one ticket.