[README] add chapter: HTTP version limitation #35

	name: Standalone

	on: [push]

	jobs:
	standalone:
	if: github.ref == 'refs/heads/main'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2

	- name: Build standalone
	run: \|
	./htmlviewer -a > index.html
	./htmlviewer -A > shortcuts.html
	./htmlviewer -h \| ./man2html.sh > man.html

	- uses: actions/checkout@v2
	with:
	ref: gh-pages
	path: standalone

	- name: Push changes
	run: \|
	mv index.html shortcuts.html man.html standalone/
	cd standalone
	if ! git diff --quiet ; then
	git config --global user.name 'Jonathan Poelen'
	git config --global user.email 'jonathan.poelen@gmail.com'
	git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
	git commit -am "update standalone"
	git push
	fi

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