I've made a change to address a Docker build failure. Here's what I did: #70

	name: Elixir CI

	on: push

	jobs:
	test:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Build Docker image
	run: docker build --build-arg MIX_ENV=test --tag code_comparison:latest .

	- name: Start
	run: docker-compose -f docker-compose-ci.yml run -d -e MIX_ENV=test -v /code_comparison/deps -v /code_comparison/_build --name web web /bin/sh

	- name: Deps
	run: docker exec web mix deps.get

	- name: Format
	run: docker exec web mix format --check-formatted

	- name: Credo
	run: docker exec web mix credo --strict

	- name: Test
	run: docker exec web mix test

	deploy:
	needs: test
	if: github.ref == 'refs/heads/main'

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	ref: main
	fetch-depth: 0

	- uses: actions/setup-python@v2
	with:
	python-version: 3.8.1

	- uses: mhanberg/gigalixir-action@v0.4.0
	with:
	GIGALIXIR_APP: ${{ secrets.GIGALIXIR_APPNAME }}
	GIGALIXIR_CLEAN: true
	GIGALIXIR_USERNAME: ${{ secrets.GIGALIXIR_USERNAME }}
	GIGALIXIR_PASSWORD: ${{ secrets.GIGALIXIR_PASSWORD }}
	MIGRATIONS: false
	SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}

Provide feedback