add link to hexlet in footer #406

	name: Main
	on: [push, pull_request]
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	node-version: [16.x]
	steps:
	- uses: actions/checkout@v2
	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v1
	with:
	node-version: ${{ matrix.node-version }}
	- name: Install Dependencies
	run: npm install --ignore-scripts
	- name: Test
	run: make test
	- name: Lint
	run: make lint
	- name: Build
	run: make build

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