add github action to deploy to pages #1

	name: Build and Deploy to Github Pages

	on:
	pull_request:
	types:
	- opened
	- synchronize
	- reopened
	branches:
	- master

	jobs:
	build_only:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	# The checkout action doesn't provide a way to get all commit history for a single branch
	# So we use the magic number 2147483647 here which means infinite depth for git fetch
	# See https://github.com/actions/checkout/issues/520, https://stackoverflow.com/a/6802238
	# this is so that last-modified-at plugin can use the git history to determine the last modified date
	fetch-depth: 2147483647
	# Use GitHub Actions' cache to cache dependencies on servers
	- uses: actions/cache@v4
	with:
	path: \|
	.asdf/**
	vendor/bundle
	key: ${{ runner.os }}-cache-${{ hashFiles('**/cache.key') }}
	restore-keys: \|
	${{ runner.os }}-cache-
	- name: Build
	uses: actions/jekyll-build-pages@v1
	- name: Upload Artifact
	uses: actions/upload-artifact@v3
	with:
	name: adsabs.github.io_site

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