add tested code

Dockerfile

@@ -0,0 +1,13 @@
+FROM openjdk:8-jre-alpine
+
+COPY drone-sonar /bin/
+COPY lib/sonar-scanner-cli-3.2.0.1227.zip /bin
+
+WORKDIR /bin
+
+RUN unzip sonar-scanner-cli-3.2.0.1227.zip \
+    && rm sonar-scanner-cli-3.2.0.1227.zip
+
+ENV PATH $PATH:/bin/sonar-scanner-3.2.0.1227/bin
+
+ENTRYPOINT /bin/drone-sonar