Issue #32: Dockerfile creation for plugin testing in CI

Dockerfile

@@ -0,0 +1,25 @@
+FROM sonarqube:6.2
+
+ARG MAVEN_VERSION=3.3.9
+ARG USER_HOME_DIR="/root"
+
+RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
+  && curl -fsSL http://apache.osuosl.org/maven/maven-3/$MAVEN_VERSION/binaries/apache-maven-$MAVEN_VERSION-bin.tar.gz \
+    | tar -xzC /usr/share/maven --strip-components=1 \
+  && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
+
+ENV MAVEN_HOME /usr/share/maven
+ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
+
+VOLUME "$USER_HOME_DIR/.m2"
+
+# update dpkg repositories to be able to install packages
+RUN apt-get update
+
+# install git
+RUN apt-get install -y git
+
+# install nano
+RUN apt-get install -y vim
+
+CMD ["mvn"]