Update Dockerfile to pull my new image from Hub

Dockerfile

@@ -1,47 +1,4 @@
-FROM ruby:2.5.1
-
-RUN apt-get update \
-    && apt-get install -yq apt-transport-https
-
-RUN apt-get install -yq \
-      libpq-dev \
-      jq
-
-RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
-    && apt-get install -yq nodejs
-
-RUN 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 \
-    && apt-get update \
-    && apt-get install -yq yarn
-
-# install java 8
-#
-RUN apt-get update \
-    && apt-get install -yq openjdk-8-jre openjdk-8-jre-headless openjdk-8-jdk openjdk-8-jdk-headless \
-    && apt-get install -yq bzip2 libgconf-2-4
-
-# install firefox
-#
-RUN FIREFOX_URL="https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=en-US" \
-  && ACTUAL_URL=$(curl -Ls -o /dev/null -w %{url_effective} $FIREFOX_URL) \
-  && curl --silent --show-error --location --fail --retry 3 --output /tmp/firefox.tar.bz2 $ACTUAL_URL \
-  && tar -xvjf /tmp/firefox.tar.bz2 -C /opt \
-  && ln -s /opt/firefox/firefox /usr/local/bin/firefox \
-  && apt-get install -y libgtk3.0-cil-dev libasound2 libasound2 libdbus-glib-1-2 libdbus-1-3 \
-  && rm -rf /tmp/firefox.* \
-  && firefox --version
-
-# install geckodriver
-
-RUN export GECKODRIVER_LATEST_RELEASE_URL=$(curl https://api.github.com/repos/mozilla/geckodriver/releases/latest | jq -r ".assets[] | select(.name | test(\"linux64\")) | .browser_download_url") \
-     && curl --silent --show-error --location --fail --retry 3 --output /tmp/geckodriver_linux64.tar.gz "$GECKODRIVER_LATEST_RELEASE_URL" \
-     && cd /tmp \
-     && tar xf geckodriver_linux64.tar.gz \
-     && rm -rf geckodriver_linux64.tar.gz \
-     && mv geckodriver /usr/local/bin/geckodriver \
-     && chmod +x /usr/local/bin/geckodriver \
-     && geckodriver --version
+FROM danbarber/ruby:2.5.1-node-browsers
 
 RUN mkdir /app
 WORKDIR /app