Removed un needed packages in prod dockerfile

deploy/rails-prod-Dockerfile

@@ -1,46 +1,22 @@
-FROM ubuntu:xenial
+FROM ruby:2.5.1-slim
 
 HEALTHCHECK --start-period=30s CMD curl --insecure https://127.0.0.1/
 
-ENV RUBY_VERSION=2.5.1
-
 ENV TINI_VERSION v0.18.0
 ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
 RUN chmod +x /tini
 
 RUN apt-get -qq update \
-  && DEBIAN_FRONTEND=noninteractive apt-get -qq upgrade -y \
   && DEBIAN_FRONTEND=noninteractive apt-get -qq install -y \
     build-essential \
-    libssl-dev \
-    libyaml-dev \
-    libreadline-dev \
     openssl \
     curl \
-    git-core \
-    zlib1g-dev \
-    bison \
-    libxml2-dev \
-    libxslt1-dev \
-    libcurl4-openssl-dev \
-    libsqlite3-dev \
     sqlite3 \
+    libsqlite3-dev \
     wget \
-    apt-transport-https \
-    ca-certificates \
-    mysql-client \
-    libmysqlclient-dev \
-    postfix \
+    default-libmysqlclient-dev \
     nodejs \
-    nginx \
-    lsb-release \
-    dirmngr \
-    gnupg \
-  && wget http://cache.ruby-lang.org/pub/ruby/$(echo $RUBY_VERSION | cut -d '.' -f 1,2)/ruby-${RUBY_VERSION}.tar.gz \
-  && tar -xzf ruby-${RUBY_VERSION}.tar.gz \
-  && cd ruby-${RUBY_VERSION} \
-  && ./configure \
-  && make && make install \
+    tzdata \
   && apt-get -qq clean \
   && apt-get autoremove -y \
   && rm -rf \
@@ -48,17 +24,21 @@ RUN apt-get -qq update \
     /tmp/* \
     /var/tmp/*
 
-# Set timezone inside the container
-RUN echo "America/New_York" > /etc/timezone \
- && rm /etc/localtime \
- && ln -s /usr/share/zoneinfo/America/New_York /etc/localtime
+RUN gem install --no-rdoc --no-ri bundler
+#Cache gems so they don't install on every code change
+RUN rm -rf /rails && mkdir /rails
+WORKDIR /rails
+COPY Gemfile Gemfile
+COPY Gemfile.lock Gemfile.lock
+RUN bundle install
 
-#New Relic
-#RUN echo deb http://apt.newrelic.com/debian/ newrelic non-free >> /etc/apt/sources.list.d/newrelic.list \
-# && wget -O- https://download.newrelic.com/548C16BF.gpg | apt-key add - \
-# && apt-get update \
-# && apt-get install newrelic-sysmond -y \
-# && nrsysmond-config --set license_key=$NEW_RELIC_LICENSE_KEY
+# Copy site into place.
+ADD . /rails/
+
+#Need temp secret keys to precompile assets
+#ENV WRESTLINGDEV_SECRET_KEY_BASE 077cdbef5c2ccf22543fb17a67339f234306b7fa2e1e4463d851c444c10a5611829a2290b253da78339427f131571fac9a42c83d960b2d25ecc10a4a0a7ce1a2
+#ENV WRESTLINGDEV_DEVISE_SECRET_KEY 2f29d49db6704377ba263f7cb9db085b386bcb301c0cd501126a674686ab1a109754071165b08cd72af03cec4642a4dd04361c994462254dd5d85e9594e8b9aa
+#RUN RAILS_ENV=production bundle exec rake assets:precompile
 
 #SSL
 RUN mkdir /ssl \
@@ -68,26 +48,8 @@ RUN mkdir /ssl \
 EXPOSE 80
 EXPOSE 443
 
-RUN gem install --no-rdoc --no-ri bundler
-#Cache gems so they don't install on every code change
-WORKDIR /tmp
-COPY Gemfile Gemfile
-COPY Gemfile.lock Gemfile.lock
-RUN bundle install
-
-# Copy site into place.
-RUN rm -rf /rails && mkdir /rails
-WORKDIR /rails/
-ADD . /rails/
-
-#Need temp secret keys to precompile assets
-ENV WRESTLINGDEV_SECRET_KEY_BASE 077cdbef5c2ccf22543fb17a67339f234306b7fa2e1e4463d851c444c10a5611829a2290b253da78339427f131571fac9a42c83d960b2d25ecc10a4a0a7ce1a2
-ENV WRESTLINGDEV_DEVISE_SECRET_KEY 2f29d49db6704377ba263f7cb9db085b386bcb301c0cd501126a674686ab1a109754071165b08cd72af03cec4642a4dd04361c994462254dd5d85e9594e8b9aa
-RUN RAILS_ENV=production bundle exec rake assets:precompile
-
 # Tini solves the zombie PID problem
 ENTRYPOINT ["/tini", "--"]
 
-WORKDIR /rails
 CMD bundle exec puma -w 3 -t 5:5 -b 'ssl://0.0.0.0:443?key=/ssl/server.key&verify_mode=none&cert=/ssl/server.crt' -e production
 #CMD bundle exec passenger start --max-pool-size 3 --environment production --ssl --ssl-certificate /ssl/server.crt --ssl-certificate-key /ssl/server.key