diff --git a/.github/workflows/docker-pr.yaml b/.github/workflows/docker-pr.yaml
new file mode 100644
index 0000000..12db2b6
--- /dev/null
+++ b/.github/workflows/docker-pr.yaml
@@ -0,0 +1,50 @@
+name: Build Docker PR preview image
+
+on:
+  workflow_dispatch:
+    inputs:
+      pr:
+        description: PR number
+        required: true
+
+jobs:
+  build:
+    name: Build and publish
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Determine ref
+        id: determine_ref
+        run: |
+          echo -n "ref=" >> "$GITHUB_OUTPUT"
+          gh pr view --json headRefName --jq .headRefName ${{ inputs.pr }} >> "$GITHUB_OUTPUT"
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ steps.determine_ref.outputs.ref }}
+
+      - name: Log in to the container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Build and publish
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ghcr.io/alexgustafsson/cupdate:pr-${{ inputs.pr }}