Official container image

Description

A pre-built container image can be an alternative while we can't use upstream's OpenResty package.

Tasks

• Build container images with kaniko.
• Build container images with podman, using Onimages as a starting point (onimages#1 (closed)).
• Publish images at GitLab's container registry.
• Upload the build image to the Docker Registry?
• Scheduled rebuild to ensure the image is up-to-date.
• Update the Composer file to use the pre-built images.
• Bonus: update TPA docs (if not already done).

Time estimation

• Complexity: very small (0.5 day)
• Uncertainty: low (x1.1)
• Reference (adapted)