add github action to build with buildx

.github/workflows/build-latest.yaml

@@ -0,0 +1,29 @@
+name: build-latest
+
+on:
+  push:
+    # branches:
+    #   - 'main'
+    paths-ignore:
+      - '**/README.md'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      # - name: Login to Docker Hub
+      #   uses: docker/login-action@v3
+      #   with:
+      #     username: ${{ secrets.DOCKERHUB_USERNAME }}
+      #     password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          push: false
+          tags: jwetzell/guacamole:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max