Unfortunate there's an issue in the asciidoctor stack itself which means it can't deal properly with remote URLs that don't have file format suffixes (.svg, .jpg, etc.) but otherwise it works. The asciidoctor attribute '-a allow-uri-read' must be set for this to work.
It's possible to use image: sources with are remote URLs, but requires a couple of packages not in the Vulkan images. Need to add these:
Unfortunate there's an issue in the asciidoctor stack itself which means it can't deal properly with remote URLs that don't have file format suffixes (.svg, .jpg, etc.) but otherwise it works. The asciidoctor attribute '-a allow-uri-read' must be set for this to work.