Use Docker actions for building multi-platform image

.github/workflows/docker.yml

@@ -1,21 +1,68 @@
 name: docker
 on: [push]
+env:
+  REGISTRY_IMAGE: cropbox/cropbox
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [linux/amd64, linux/arm64]
     steps:
-      - uses: easimon/maximize-build-space@v7
-        with:
-          overprovision-lvm: 'true'
-          remove-dotnet: 'true'
-          remove-android: 'true'
+      - run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
       - uses: actions/checkout@v4
-      - uses: rlespinasse/github-slug-action@v4
-      - uses: jupyterhub/repo2docker-action@master
+      - id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: .binder/Dockerfile
+          platforms: ${{ matrix.platform }}
+          build-args: REPO_DIR=/home/Cropbox.jl
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+      - run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+  merge:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+      - uses: docker/setup-buildx-action@v3
+      - id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+      - uses: docker/login-action@v3
         with:
-          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
-          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
-          REPO_DIR: "/home/Cropbox.jl"
-          IMAGE_NAME: "cropbox/cropbox"
-          LATEST_TAG_OFF: true
-          ADDITIONAL_TAG: ${{ env.GITHUB_REF_SLUG }}
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+      - run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}