enable droneci support

.drone.yml

@@ -0,0 +1,31 @@
+kind: pipeline
+name: default
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+  # test if it compiles correctly
+  - name: build
+    image: maven:3-eclipse-temurin-17
+    commands:
+      - mvn verify --no-transfer-progress -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+
+  # run unit tests
+  - name: test
+    image: maven:3-eclipse-temurin-17
+    commands:
+      - mvn test --no-transfer-progress -B -V
+
+  # run code analysis
+  - name: code-analysis
+    image: maven:3-eclipse-temurin-17
+    commands:
+      - mvn sonar:sonar --no-transfer-progress -Dsonar.projectKey=$SONAR_PROJECT_KEY -Dsonar.host.url=$SONAR_INSTANCE_URL -Dsonar.login=$SONAR_LOGIN_KEY -B -V
+    environment:
+      SONAR_PROJECT_KEY:
+        from_secret: sonar_project_key
+      SONAR_INSTANCE_URL:
+        from_secret: sonar_instance_url
+      SONAR_LOGIN_KEY:
+        from_secret: sonar_login_key