Build docker images on github actions (#59)

.github/workflows/main.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     env:
       MIX_ENV: test
     steps:
@@ -13,11 +13,54 @@ jobs:
       - uses: erlef/setup-elixir@v1
         with:
           otp-version: 27.2
-          elixir-version: 1.17.3
+          elixir-version: 1.18.1
 
       - run: mix deps.get
       - run: mix deps.compile
       - run: mix compile --warnings-as-errors
       - run: mix test
       - run: mix format --check-formatted
       - run: mix deps.unlock --check-unused
+
+  docker:
+    name: Docker
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+    env:
+      IMAGE_NAME: 'preview'
+      PROJECT_ID: 'hexpm-prod'
+      SERVICE_ACCOUNT: ${{ secrets.GCLOUD_SERVICE_ACCOUNT }}
+      WORKLOAD_IDENTITY_PROVIDER: ${{ secrets.GCLOUD_WORKFLOW_IDENTITY_POOL_PROVIDER }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set short git commit SHA
+        id: vars
+        run: |
+          calculatedSha=$(git rev-parse --short ${{ github.sha }})
+          echo "COMMIT_SHORT_SHA=$calculatedSha" >> $GITHUB_ENV
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Google auth
+        id: auth
+        uses: 'google-github-actions/auth@v2'
+        with:
+          token_format: 'access_token'
+          project_id: ${{ env.PROJECT_ID }}
+          service_account: ${{ env.SERVICE_ACCOUNT }}
+          workload_identity_provider: ${{ env.WORKLOAD_IDENTITY_PROVIDER }}
+      - name: Docker Auth
+        id: docker-auth
+        uses: 'docker/login-action@v3'
+        with:
+          registry: gcr.io
+          username: 'oauth2accesstoken'
+          password: '${{ steps.auth.outputs.access_token }}'
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          tags: gcr.io/${{ env.PROJECT_ID }}/${{ env.IMAGE_NAME }}:${{ env.COMMIT_SHORT_SHA }}
+          push: ${{ github.event_name != 'pull_request' }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -1,6 +1,6 @@
-ARG ELIXIR_VERSION=1.17.3
+ARG ELIXIR_VERSION=1.18.1
 ARG ERLANG_VERSION=27.2
-ARG DEBIAN_VERSION=bookworm-20241202-slim
+ARG DEBIAN_VERSION=bookworm-20241223-slim
 
 FROM hexpm/elixir:${ELIXIR_VERSION}-erlang-${ERLANG_VERSION}-debian-${DEBIAN_VERSION} AS build
 

mix.exs

@@ -5,7 +5,7 @@ defmodule Preview.MixProject do
     [
       app: :preview,
       version: "0.1.0",
-      elixir: "~> 1.17",
+      elixir: "~> 1.18",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),