Adding SonarQube Stack (#352)

* Adding SonarQube Stack

* Updating configuration

templates/sonarqube/README.md

@@ -0,0 +1,17 @@
+## What is inside SonarQube Stack?
+* [SonarQube Server](http://www.sonarqube.org/) + Sidekick for storing plugins
+* Postgres Database + Sidekick for storing data
+
+## Info
+* In default SonarQube stack will create "sonar" postgres database with sonar user.  
+* Additional variables `http_proxy` and `https_proxy` are included, which can be helpfull in some cases.
+* Once SonarQube will start, make sure you setup correct information in setup page.
+* For easy upgrades there are sidekicks for both postgress and SonarQube with dedicated storage.
+
+## Installing Plugins Manually
+* Go to [Plugin Library](http://docs.sonarqube.org/display/PLUG/Plugin+Library) and find your favourite plugins
+* Execute `docker exec -it [sonarqube-data bash]`, go to /opt/sonarqube/extensions/plugins and put your plugins here
+* Restart SonarQube container.
+
+## First Start
+* Use admin/admin to login to the SonarQube interface.