Add section about switching login nodes #227

	---
	# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
	name: build docs (to test changes in PRs)
	on: [push, pull_request]
	permissions:
	contents: read # to fetch code (actions/checkout)
	jobs:
	build:
	runs-on: ubuntu-20.04
	steps:
	- name: checkout
	uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'

	- name: install required Python packages
	run: \|
	pip install -r requirements.txt
	cd custom_plugin && pip install . && cd -
	cd computational_macros && pip install . && cd -
	python3 -m pip list
	mkdocs --version

	# equivalent of 'mkdocs build', but need to build all flavors of the docs (different site/OS)
	- name: build docs
	run: \|
	python3 build.py
	find build -type f

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