Check that it builds

.github/workflows/check-does-build.yml

@@ -0,0 +1,27 @@
+name: check-does-build
+
+on: [ push, pull_request ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Verify wrapper
+        uses: gradle/actions/wrapper-validation@v3
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+
+      - name: Gradle build
+        run: ./gradlew build