add CI

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: CI
+
+# Controls when the workflow will run
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+  schedule:
+  - cron: "13 01 * * *"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+      - run: npm update
+      - run: ant
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: build
+          path: build/*.xar
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: build/*.xar
+