I wanted to read the VueJS docs on my eink tablet. HTML seems to work even better then EPUB in Boox NeoReader app.

vue3-docs-to-eink.sh

#!/usr/bin/env bash

set -e

TEMPORARY="vue-docs.md"
GUIDE_PATH="./src/guide/"
OUTPUT_EPUB="vue-docs.epub"
OUTPUT_HTML="vue-docs.html"

git clone --depth=1 https://github.com/vuejs/docs
cd docs

touch ${GUIDE_PATH}${TEMPORARY}
cat .vitepress/config.ts | rg -v 'html|//' | rg "/guide/[^']+" --only-matching | while read -r guide_path; do
  CURRENT_GUIDE=`echo $guide_path | xargs dirname | xargs basename`
  cat "src${guide_path}.md" | sed "s#images/#${CURRENT_GUIDE}/images/#" >> ${GUIDE_PATH}${TEMPORARY}
done

cd $GUIDE_PATH
pandoc $TEMPORARY -o $OUTPUT_EPUB
pandoc $TEMPORARY -o $OUTPUT_HTML
cd ../..
mv ${GUIDE_PATH}$OUTPUT_EPUB ./
mv ${GUIDE_PATH}$OUTPUT_HTML ./

Thanks @lttr I am using the generated html version in my kobo (e-ink device)