Add Dockerfile #51

	name: continuous-integration

	on: [push, pull_request]

	jobs:
	CI:
	name: continuous-integration
	runs-on: ubuntu-latest
	timeout-minutes: 15
	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	- name: Read .nvmrc
	run: echo ::set-output name=NVMRC::$(cat .nvmrc)
	id: nvm

	- name: Setup Node.js
	uses: actions/setup-node@master
	with:
	node-version: '${{ steps.nvm.outputs.NVMRC }}'

	- name: Check for cached node_modules
	uses: actions/cache@v2
	id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
	with:
	path: \|
	node_modules
	//node_modules
	key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}

	- name: Install dependencies
	if: steps.cache-deps.outputs.cache-hit != 'true'
	run: yarn install --nonInteractive --frozen-lockfile

	- name: Lint
	run: yarn run lint:ci

	- name: Build
	run: yarn run build

	# TO-DO: Uncomment when tests are ready to be run on CI (such as those in issues #129-#131)
	# - name: Test
	# run: yarn test:ci

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