Use curl instead of wget

concourse/docker/Dockerfile

@@ -12,10 +12,6 @@ RUN apt-get update && apt-get install -y \
   xvfb \
   icewm
   
-RUN  apt-get update \
-  && apt-get install -y wget \
-  && rm -rf /var/lib/apt/lists/*  
-
 RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - \
   && apt-get install -y nodejs
 
@@ -25,7 +21,7 @@ RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
  && apt-get install -y yarn
  
 # Install Google Chrome
-RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
+RUN curl -sS - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
 RUN sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
 RUN apt-get update && apt-get install -y google-chrome-stable