Merge pull request #2 from AstrumBot/ci/pr-validation

ci: add PR validation workflow (build + verify, no push)

Author: Nyrest

.github/workflows/docker-verify.yml

@@ -0,0 +1,39 @@
+name: Verify PR Build
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - README.md
+
+permissions:
+  contents: read
+
+env:
+  IMAGE_NAME: astrum-agent-runtime
+
+jobs:
+  verify:
+    name: Build and verify image
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build image for verification
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          load: true
+          tags: ${{ env.IMAGE_NAME }}:pr-${{ github.event.number }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Verify runtime
+        run: docker run --rm "${{ env.IMAGE_NAME }}:pr-${{ github.event.number }}" verify-runtime