Adds custom-made modules to learn/modularity #118

	name: CheckMkDocsBuild
	on:
	# Trigger the workflow on a new pull request on main
	pull_request_target:
	branches:
	- main

	jobs:
	build-docs-site:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2

	- name: Allow to move dotfiles
	run: \|
	# move also dotfile with *
	shopt -s dotglob

	- name: Clone Tanssi MKDocs
	run: \|
	# clone mkdocs repo locally
	git clone https://${{ secrets.REPO_SCOPED_TOKEN }}@github.com/moondance-labs/tanssi-mkdocs.git

	- name: Move tanssi-docs contents to mkdocs repository
	run: \|
	mkdir tanssi-mkdocs/tanssi-docs
	mv * tanssi-mkdocs/tanssi-docs &> /dev/null \|\| echo "Error with mv expected due to recursively moving all contents into subfolder"

	- name: Install pip requirements
	run: \|
	cd tanssi-mkdocs
	# upgrade pip
	pip3 install --upgrade pip setuptools==65.7.0
	# install dependencies quietly
	pip3 install -r requirements.txt &> /dev/null && echo "Dependencies installed" \|\| echo "Error while installing dependencies"

	- name: Build mkdocs
	run: \|
	cd tanssi-mkdocs
	# change destination build folder in mkdocs YAML to local site/
	sed -i "s/'site_dir'.*/'site_dir': 'site'/" mkdocs.yml
	# build project
	python3 -m mkdocs build

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