Default Docker builds to amd64

.gitea/workflows/docker-publish.yml

@@ -11,14 +11,14 @@ on:
   workflow_dispatch:
     inputs:
       platforms:
-        description: "Target platforms to build (comma-separated)"
+        description: "Target platforms, comma-separated. Adding an arm target needs a privileged runner."
         required: false
-        default: "linux/amd64,linux/arm64"
+        default: "linux/amd64"
 
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: sirblobby/typstdrive
-  DEFAULT_PLATFORMS: "linux/amd64,linux/arm64"
+  DEFAULT_PLATFORMS: "linux/amd64"
 
 jobs:
   build-and-push:
@@ -28,7 +28,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Resolve target platforms
+        id: platforms
+        run: echo "value=${{ github.event.inputs.platforms || env.DEFAULT_PLATFORMS }}" >> "$GITHUB_OUTPUT"
+
       - name: Set up QEMU
+        if: contains(steps.platforms.outputs.value, 'arm')
         uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
@@ -59,7 +64,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          platforms: ${{ github.event.inputs.platforms || env.DEFAULT_PLATFORMS }}
+          platforms: ${{ steps.platforms.outputs.value }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}