diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 762c2eb1..a7700142 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,28 +1,79 @@
+name: Docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
 on:
   push:
+    branches: [ "main" ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 
 jobs:
   build:
-    name: Build, push, and deploy
+
     runs-on: ubuntu-latest
-    if: github.ref == 'refs/heads/main'
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@main
+        with:
+          cosign-release: 'v1.11.0'
+
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+              latest
+
 
-    - name: Checkout
-      uses: actions/checkout@v2
-
-    - name: Build container image
-      run: |
-        docker build \
-        --tag ghcr.io/cp6/my-idlers:$(echo $GITHUB_SHA | head -c7) \
-        --tag ghcr.io/cp6/my-idlers:latest \
-        .
-    - name: Container registry login
-      run: |
-        echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u "${{ github.actor }}" --password-stdin
-      
-    - name: Push image to GHCR
-      if: github.ref == 'refs/heads/main'
-      run: |
-        docker push ghcr.io/cp6/my-idlers:$(echo $GITHUB_SHA | head -c7)
-        docker push ghcr.io/cp6/my-idlers:latest
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          platforms: linux/amd64,linux/arm64
+          cache-from: type=gha
+          cache-to: type=gha,mode=max