message: Install build-essential instead of just gcc and make
diff: @@ -3,9 +3,8 @@ FROM ubuntu:16.04
  ARG PACKAGECLOUD_URL
  RUN apt-get update -y && apt-get install -y \
  + build-essential \
  curl \
  - gcc \
  - make \
  ruby \
  ruby-dev \
  && gem install fpm
  