Robustified, with better management of LEEC caller state. #105

	name: Erlang CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:

	build:

	runs-on: ubuntu-latest

	# See https://hub.docker.com/_/erlang:
	container:
	image: erlang:latest

	steps:
	- uses: actions/checkout@v2
	- name: Compile
	run: \|
	echo "Checking distribution and version"
	cat /etc/*-release
	# Actually does not look as an Ubuntu but a Debian:
	#echo "## Listing repositories: $(cat /etc/apt/sources.list)"
	#echo "## Updating packages (1/2)"
	#apt-get update
	#echo "## Installing add-apt-repository"
	#apt-get install --assume-yes software-properties-common
	#echo "## Adding universe"
	#add-apt-repository universe
	#echo "## Updating packages (2/2)"
	#apt-get update
	echo "## Updating packages"
	apt-get update
	apt-get install --assume-yes tree
	rebar3 compile
	echo " - building from: $(pwd)"
	echo " - content of parent directory: $(ls .. 2>/dev/null \| tr '\n' ' ')"
	echo " - content of _checkouts directory: $(ls _checkouts 2>/dev/null)"
	echo " - content of _build/default/lib directory: $(ls _build/default/lib 2>/dev/null)"
	make info-context
	- name: Run tests
	run: \|
	base_dir="$(pwd)"
	echo "Base directory is: '${base_dir}'."
	cfg_dir="${HOME}/.config/universal-server/"
	echo "Configuration directory is: '${cfg_dir}'."
	us_common_base_dir="${base_dir}/_build/default/lib/us_common"
	mkdir -p "${cfg_dir}"
	cd "${cfg_dir}"
	ln -s "${us_common_base_dir}/priv/for-testing/us.config"
	ln -s "${base_dir}/priv/for-testing/us-web-for-tests.config"
	cd "${base_dir}"
	make test-ci NODE_NAMING="--sn"

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