docs: update README and add cts_refer doc #76

	name: 4.0

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:
	test-with-redis-4-0:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: clone and build redis
	run: \|
	sudo apt-get install git ruby
	git clone https://github.com/redis/redis
	cd redis
	git checkout 4.0
	make -j

	- name: start redis
	run: \|
	./redis/src/redis-server &

	- name: start redis cluster
	run: \|
	sudo gem install redis
	cd redis/utils/create-cluster
	./create-cluster start
	echo yes\|./create-cluster create

	- name: set up python
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- name: install requirements
	run: pip install -r requirements.txt

	- name: run test
	run: python redis_compatibility_test.py --testfile cts.json --specific-version 4.0.0 --show-failed > test.result

	- name: check fail tests
	run: \|
	cat test.result
	grep -q "This is failed tests for" test.result && exit -1 \|\| exit 0

	- name: run cluster test
	run: python redis_compatibility_test.py --testfile cts.json --port 30001 --specific-version 4.0.0 --cluster --show-failed > cluster.result

	- name: check cluster fail tests
	run: \|
	cat cluster.result
	grep -q "This is failed tests for" cluster.result && exit -1 \|\| exit 0

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