Add GHA docker build

.github/workflows/build.yaml

@@ -0,0 +1,22 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Build and push
+        uses: lsst-dm/build-and-push@main
+        id: build
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          platforms: linux/amd64,linux/arm64
+          image: ${{ github.repository }}
+          push: true