Update elixir Docker tag to v1.18.0 #160

	name: Test PR

	on:
	pull_request:
	branches: [trunk]

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Elixir
	uses: erlef/setup-beam@v1
	with:
	elixir-version: "1.14.1"
	otp-version: "25.1.2"
	- name: Restore dependencies cache
	uses: actions/cache@v3
	with:
	path: deps
	key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ runner.os }}-mix-
	- name: Setup PostgreSQL
	uses: Harmon758/postgresql-action@v1.0.0
	with:
	# Version of PostgreSQL to use
	postgresql version: "12"
	# POSTGRES_DB - name for the default database that is created
	postgresql db: nisse_test
	# POSTGRES_USER - create the specified user with superuser power
	postgresql user: nisse
	# POSTGRES_PASSWORD - superuser password
	postgresql password: nisse
	- name: Install dependencies
	run: mix deps.get
	- name: Run tests
	run: mix test
	env:
	DB_URL: "ecto://nisse:nisse@localhost:5432/nisse_test"
	SECRET_KEY_BASE: "rU3X/+Fw60UYALcN51sAtD+c3jFSjjSsCSY83IGmaJywiwiSVyNnepYKZSPYO0Uv"
	SIGNING_SALT: "5bb1LGNuwb8LHpHAMTtG9HCdg5VJbYBoNy/etC88WjbEHhZqbRuBiiQSaSzZZroE"

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