add c++ compiler

Author: avouacr

Dockerfile

@@ -6,7 +6,8 @@ RUN sudo apt-get -y update && \
                             cmake \
                             jq \
                             bash-completion \
-                            vim
+                            vim \
+                            g++
 
 # Install kubectl
 RUN sudo wget "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl" -O /usr/local/bin/kubectl && \