Use Depot for Docker image builds

.github/workflows/build-docker.yml

@@ -23,7 +23,10 @@ env:
 jobs:
   docker-build:
     name: Build Docker image (ghcr.io/astral-sh/uv) for ${{ matrix.platform }}
-    runs-on: ubuntu-latest
+    runs-on: depot-ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write # for Depot OIDC
     environment:
       name: release
     strategy:
@@ -37,7 +40,7 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: docker/setup-buildx-action@v3
+      - uses: depot/setup-action@v1
 
       - uses: docker/login-action@v3
         with:
@@ -76,8 +79,10 @@ jobs:
       # Adapted from https://docs.docker.com/build/ci/github-actions/multi-platform/
       - name: Build and push by digest
         id: build
-        uses: docker/build-push-action@v6
+        uses: depot/build-push-action@v1
         with:
+          project: 7hd4vdzmw5
+          token: ${{ secrets.DEPOT_TOKEN }}
           context: .
           platforms: ${{ matrix.platform }}
           cache-from: type=gha,scope=uv-${{ env.PLATFORM_TUPLE }}