bootstrap.sh in achecker-0.0.3 vs bootstrap.sh in achecker-0.0.4

@@ -13,15 +13,20 @@
 
 function install_basic_packages {
   apt-get install -y vim curl git
 }
 
+function install_libs {
+  apt-get install -y zlib1g-dev
+}
+
 function install_ruby {
   echo "Installing ruby..."
   apt-get install -y ruby2.1 ruby2.1-dev
   gem install bundler
   echo "Done installing ruby."
 }
 
 update_apt_repositories
 install_basic_packages
+install_libs
 install_ruby