Added drone file

.drone.yml

@@ -0,0 +1,22 @@
+kind: pipeline
+name: sonarcube
+type: docker
+
+steps:
+  - name: code-analysis
+    pull: if-not-exists
+    image: sonarsource/sonar-scanner-cli
+    commands:
+      - sonar-scanner -Dsonar.host.url=$SONAR_HOST -Dsonar.login=$SONAR_TOKEN -Dsonar.projectKey=$SONAR_PROJECT_KEY
+    environment:
+      SONAR_HOST:
+        from_secret: sonar_host
+      SONAR_TOKEN:
+        from_secret: sonar_token
+      SONAR_PROJECT_KEY:
+        from_secret: sonar_project_key
+
+trigger:
+  event:
+    - push
+    - pull_request