Hey guys,

I need a lot of help getting github actions up and running with my private postgres project. I get the following error on github actions:

Error: 22:36:19.848 [error] Postgrex.Protocol (#PID<0.457.0>) failed to connect: **
 (DBConnection.ConnectionError) tcp connect (invoices_control_db:5432): 
      non-existing domain - :nxdomain

Here is my workflow file:

name: Elixir CI

on:
  push:
    branches: ['master']
  pull_request:
    branches: ['master']

env:
  MIX_ENV: test
  # NOTE: make sure these versions match in Containerfile and .tool-versions
  ELIXIR_VERSION_SPEC: "1.15.1"
  OTP_VERSION_SPEC: "26.0.2"

jobs:
  compile:
    name: Compile
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1.16
        with:
          elixir-version: ${{ env.ELIXIR_VERSION_SPEC }}
          otp-version: ${{ env.OTP_VERSION_SPEC }}
      - name: Install dependencies
        run: mix deps.get
      - name: Compile dependencies
        run: mix deps.compile
      - name: Compile
        run: mix compile --warnings-as-errors

  test:
    name: Test
    runs-on: ubuntu-22.04

    services:
      postgres:
        image: postgres:latest
        ports: ['5432:5432']
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    env:
      MIX_ENV: test

    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1.16
        with:
          elixir-version: ${{ env.ELIXIR_VERSION_SPEC }}
          otp-version: ${{ env.OTP_VERSION_SPEC }}
      - name: Install dependencies
        run: mix deps.get
      - name: Compile dependencies
        run: mix deps.compile
      - name: Setup database
        env:
          DATABASE_URL: postgresql://postgres:postgres@invoices_control_db:${{job.services.postgres.ports[5432]}}/invoices_control_test
          DB_USERNAME: postgres
          DB_PASSWORD: postgres
          DB_HOSTNAME: invoices_control_db
          MIX_ENV: test
        run:
          mix ecto.drop
          mix ecto.create
          mix ecto.migrate
      - name: Run tests
        env:
          DATABASE_URL: postgresql://postgres:postgres@invoices_control_db:${{job.services.postgres.ports[5432]}}/invoices_control_test
          DB_USERNAME: postgres
          DB_PASSWORD: postgres
          DB_HOSTNAME: invoices_control_db
          MIX_ENV: test
        run:
          mix ecto.drop
          mix ecto.create
          mix ecto.migrate
          mix test

  check-formatted:
    name: Check Formatted
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1.16
        with:
          elixir-version: ${{ env.ELIXIR_VERSION_SPEC }}
          otp-version: ${{ env.OTP_VERSION_SPEC }}
      - name: Install dependencies
        run: mix deps.get
      - name: Compile dependencies
        run: mix deps.compile
      - name: Check formatted
        run: mix format --check-formatted

  credo:
    name: Credo
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1.16
        with:
          elixir-version: ${{ env.ELIXIR_VERSION_SPEC }}
          otp-version: ${{ env.OTP_VERSION_SPEC }}
      - name: Install dependencies
        run: mix deps.get
      - name: Compile dependencies
        run: mix deps.compile
      - name: Run credo
        run: mix credo --strict

what do you think about this?