Update Dockerfile

Author: tobre6

Dockerfile

@@ -11,8 +11,8 @@ RUN apt-get update && \
             curl
 
 RUN curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -
-RUN echo 'deb https://deb.nodesource.com/node_4.x jessie main' > /etc/apt/sources.list.d/nodesource.list
-RUN echo 'deb-src https://deb.nodesource.com/node_4.x jessie main' >> /etc/apt/sources.list.d/nodesource.list
+RUN echo 'deb https://deb.nodesource.com/node_6.x jessie main' > /etc/apt/sources.list.d/nodesource.list
+RUN echo 'deb-src https://deb.nodesource.com/node_6.x jessie main' >> /etc/apt/sources.list.d/nodesource.list
 
 RUN apt-get update && \
     apt-get install -yq \