add container build action

Signed-off-by: Thomas Sjögren <[email protected]>

.github/workflows/containerbuild.yml

@@ -0,0 +1,29 @@
+name: Container build
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 5 * * */2"
+
+permissions:
+  contents: read
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: false