chore: workflow and docker image tweaks (#11341)

.github/workflows/publish-dev-docker.yml

@@ -3,29 +3,88 @@ on:
   schedule:
     - cron: '0 */12 * * *'
   workflow_dispatch:
+env:
+  IMAGE_NAME: discordjs/proxy
 jobs:
-  docker-publish:
-    name: Docker publish
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'discordjs'
+  build:
+    name: Build ${{ matrix.platform }}
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
     steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
       - name: Checkout repository
-        uses: actions/checkout@v5
-
-      - name: Install Node.js v24
-        uses: actions/setup-node@v6
-        with:
-          node-version: 24
-          package-manager-cache: false
-
-      - name: Install dependencies
-        uses: ./packages/actions/src/pnpmCache
+        uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
       - name: Login to DockerHub
-        run: echo ${{ secrets.DOCKER_ACCESS_TOKEN }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_ACCESS_TOKEN }}
 
-      - name: Build & push docker image
-        run: docker build -f packages/proxy-container/Dockerfile -t discordjs/proxy:latest --push .
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: packages/proxy-container/Dockerfile
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v5
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    name: Create and push manifest list
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v6
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_ACCESS_TOKEN }}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create -t ${{ env.IMAGE_NAME }}:latest \
+            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:latest