doc(readme): intro easiest install meth and nimpylib #21

	name: playground-deploy

	# yamllint disable-line rule:truthy
	on:
	push:
	branches:
	- master
	tags:
	- v.
	workflow_dispatch:

	env:
	nim-version: 'stable'
	git-repo-url: https://github.com/${{ github.repository }}
	deploy-dir: .gh-pages
	jobs:
	docs:
	runs-on: ubuntu-latest
	permissions:
	contents: write
	steps:
	- uses: actions/checkout@v4
	- name: Cache nimble
	id: cache-nimble
	uses: actions/cache@v4
	with:
	path: ~/.nimble
	key: ${{ runner.os }}-nimble
	- uses: jiro4989/setup-nim-action@v1
	with:
	nim-version: ${{ env.nim-version }}
	- name: install karax
	run: nimble install karax
	- name: buildKarax
	run: \|
	nimble buildKarax \
	-d:homepage="${{ github.event.repository.homepage }}" -d:gitRepoUrl="${{ env.git-repo-url }}" \
	-d:release --opt:size --includeJs \
	--htmlName=index
	- name: "CNAME"
	run: mkdir ${{ env.deploy-dir }} \|\| true
	- name: mv to deploy dir
	run: mv index.html ${{ env.deploy-dir }}/index.html
	- name: create deploy-dir if needed
	run: \|
	cname=$(echo ${{ github.event.repository.homepage }} \| grep -oP 'https?://\K[^/]+')
	prefix="play."
	# py: if not cname.startswith(prefix)
	# bash: if [[ "${cname}" != $prefix* ]]
	if [ ${cname##$prefix} = $cname ]; then
	cname="${prefix}${cname}"
	fi
	echo -n $cname > ${{ env.deploy-dir }}/CNAME
	# We must re-build CNAME as we use 'peaceiris/actions-gh-pages@v4',
	# where the old dir (including CNAME) will be purged.
	- name: Deploy documents
	uses: peaceiris/actions-gh-pages@v4
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ${{ env.deploy-dir }}

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