ci: build arm64 images

.github/workflows/builds.yml

@@ -11,7 +11,13 @@ on:
 jobs:
   build:
     name: Build
+
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        arch: [amd64, arm64]
+
     steps:
       - name: Checkout Entire Repository
         uses: actions/checkout@v4
@@ -21,6 +27,7 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        platforms: linux/${{ matrix.arch }}
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2