Remove temporary files in /tmp in Dockerfile

Dockerfile

@@ -33,6 +33,7 @@ ENV MAVEN_HOME /usr/share/maven
 
 # Add configuration files, bashrc and other tweaks
 COPY ./s2i/bin/ $STI_SCRIPTS_PATH
+RUN rm -rf /tmp/*
 
 RUN chown -R 1001:0 /opt/app-root
 USER 1001