github action for building container, using cache

.github/workflows/devcontainer.yml

@@ -0,0 +1,42 @@
+name: "Build devcontainer"
+
+on:
+  workflow_dispatch:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      # -
+      #   name: Checkout
+      #   uses: actions/checkout@v3
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ghcr.io/citusdata/citus-devcontainer
+          tags: |
+            type=ref,event=branch
+            type=sha
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: 'Login to GitHub Container Registry'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: "{{defaultContext}}:.devcontainer"
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max