Update NodeJS to 9.x version

Dockerfile

@@ -7,7 +7,7 @@ RUN \
  && apt-get install --no-install-recommends -y apt-transport-https \
  && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
  && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
- && curl -sL https://deb.nodesource.com/setup_8.x | bash - \
+ && curl -sL https://deb.nodesource.com/setup_9.x | bash - \
  && apt-get install --no-install-recommends -y \  
   nodejs \
   unzip \