chore: add GitHub action

.github/workflows/ci.yaml

@@ -0,0 +1,40 @@
+name: ci
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      -
+        name: Set up Buildx driver
+        run: docker buildx create --use
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '^1.13.1'
+      -
+        name: Build
+        run: docker build --platform=linux/amd64,linux/arm64 -t ghcr.io/siderolabs/kube-scheduler .
+      -
+        name: Login to ghcr.io
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
+      -
+        name: Push container
+        run: docker push ghcr.io/siderolabs/kube-scheduler:latest