Create workflow

Author: albertominetti

.github/workflows/main.yml

@@ -0,0 +1,17 @@
+name: Java build CI
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+    - name: Set up JDK 21
+      uses: actions/setup-java@v1
+      with:
+          java-version: 21
+    - name: Compile with Maven
+      run: mvn -B -U compile
+    - name: Test
+      run: mvn -B -U test