Fix fallback image selection #395

	---
	name: 'Rails Unit Tests'

	"on":
	push:
	branches:
	- 'master'
	paths-ignore:
	- 'doc/**'
	- '**.md'
	pull_request:
	branches:
	- 'master'
	paths-ignore:
	- 'doc/**'
	- '**.md'

	jobs:
	build:
	runs-on: 'ubuntu-latest'

	strategy:
	matrix:
	ruby: ['3.0']

	services:
	postgres:
	image: 'postgres:11'
	env:
	POSTGRES_PASSWORD: 'postgres'
	ports: ['5432:5432']
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 10s
	--health-retries 10
	memcached:
	image: 'memcached'
	ports: ['11211:11211']

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

	- name: 'Set up Ruby ${{ matrix.ruby }}'
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}

	- name: Install required package
	run: \|
	sudo apt-get install libpq-dev
	- name: Cache gems
	id: cache
	uses: actions/cache@v2
	with:
	path: vendor/bundle
	key: ruby-${{ matrix.ruby }}-gem-${{ hashFiles('**/Gemfile.lock') }}
	restore-keys: \|
	ruby-${{ matrix.ruby }}-gem-

	- name: 'Build and run tests'
	env:
	RAILS_TEST_DB_NAME: 'postgres'
	RAILS_TEST_DB_USERNAME: 'postgres'
	RAILS_TEST_DB_PASSWORD: 'postgres'
	RAILS_ENV: 'test'
	run: \|
	gem install bundler --version '~> 2'
	bundle config path vendor/bundle
	bundle install --jobs 4 --retry 3
	bundle exec rails db:create
	bundle exec rails db:migrate
	bundle exec rails test

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