trying to install additional packages required for nokogiri.

Dockerfile

@@ -20,7 +20,7 @@ RUN gem install bundler
 # If you want to run in Deploy mode, just run `bundle install` locally to update
 # Gemfile.lock, and uncomment the following line.
 # RUN bundle config set --local deployment 'true'
-RUN apt-get install -y libxslt-dev liblzma-dev patch git-core zlib1g-dev libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev software-properties-common libffi-dev
+RUN apt-get install -y libxslt-dev liblzma-dev patch git-core zlib1g-dev libssl-dev libreadline-dev libyaml-dev libsqlite3-dev libxml2-dev libxslt1-dev libcurl4-openssl-dev libffi-dev
 RUN bundle install
 
 ADD . $INSTALL_PATH