Add sonar code analisys drone step

.drone.yml

@@ -3,6 +3,14 @@ type: docker
 name: default
 
 steps:
+- name: code-analysis
+  image: aosapps/drone-sonar-plugin
+  settings:
+    sonar_host: https://sonar.hatthieves.es
+    sonar_token:
+      from_secret: sonar_token
+    sources: ./lib
+
 - name: Build Ubuntu deb package
   image: ubuntu
   volumes: