Create pull_request_ubuntu_build.yml

.github/workflows/pull_request_ubuntu_build.yml

@@ -0,0 +1,21 @@
+name: CI - Pull request - Ubuntu
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 11
+      uses: actions/setup-java@v4
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn clean install