Add GitHub Actions CI workflow (clean install site)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644 (file)
index 0000000..7eb9e3c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: maven
+      - run: ./mvnw --batch-mode clean install site