updated app.js instructions in presence.md #263 #416

	name: Elixir CI

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

	jobs:
	build:
	name: Build and test
	runs-on: ubuntu-latest
	services:
	postgres:
	image: postgres:12
	ports: ['5432:5432']
	env:
	POSTGRES_PASSWORD: postgres
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	steps:
	- uses: actions/checkout@v2
	- name: Set up Elixir
	uses: erlef/setup-beam@v1
	with:
	elixir-version: '1.14.2' # Define the elixir version [required]
	otp-version: '25.1.2' # Define the OTP version [required]
	- name: Restore dependencies cache
	uses: actions/cache@v2
	with:
	path: deps
	key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ runner.os }}-mix-
	- name: Install dependencies
	run: mix deps.get
	- name: Run Tests
	run: mix coveralls.json
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	MIX_ENV: test
	AUTH_API_KEY: ${{ secrets.AUTH_API_KEY }}
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1

	# Continuous Deployment to Fly.io
	# https://fly.io/docs/app-guides/continuous-deployment-with-github-actions/
	deploy:
	name: Deploy app
	runs-on: ubuntu-latest
	needs: build
	# https://stackoverflow.com/questions/58139406/only-run-job-on-specific-branch-with-github-actions
	if: github.ref == 'refs/heads/main'
	env:
	FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
	steps:
	- uses: actions/checkout@v2
	- uses: superfly/flyctl-actions@1.1
	with:
	args: "deploy"

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