add ci

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - run: nix build .
+      - uses: actions/upload-artifact@v4
+        with:
+          name: kernel.wasm
+          path: result/vmlinux

.gitignore

@@ -170,4 +170,7 @@ sphinx_*/
 /rust-project.json
 
 # Nix build output
-/result
+/result
+
+# GitHub Actions
+!/.github/