ci(docker-build): use github actions runner images (#15)

drop blacksmith

Author: cesarcoatl

.github/workflows/docker-build-push-multi-registry.yml

@@ -78,9 +78,9 @@ jobs:
       fail-fast: false
       matrix:
         builder:
-          - runner-image: blacksmith-4vcpu-ubuntu-2404
+          - runner-image: ubuntu-24.04
             platform: linux/amd64
-          - runner-image: blacksmith-4vcpu-ubuntu-2404-arm
+          - runner-image: ubuntu-24.04-arm
             platform: linux/arm64
     steps:
       - name: Checkout repository
@@ -121,12 +121,12 @@ jobs:
           username: ${{ inputs.quay-username }}
           password: ${{ secrets.quay-password }}
 
-      - name: Setup Docker Builder
-        uses: useblacksmith/setup-docker-builder@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
       - name: Build and push by digest
         id: build
-        uses: useblacksmith/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           context: ${{ inputs.build-context }}
           file: ${{ inputs.build-file }}
@@ -150,7 +150,7 @@ jobs:
           retention-days: 1
 
   merge:
-    runs-on: blacksmith-2vcpu-ubuntu-2404
+    runs-on: ubuntu-24.04
     needs:
       - build
     steps: