Adding dockerfile to build modyo:9

9/Dockerfile

@@ -0,0 +1,21 @@
+FROM jruby:9.2.9.0
+
+RUN apt-get update -qq && apt-get dist-upgrade -y
+
+RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
+
+RUN apt-get install -y build-essential \
+    nodejs \
+    zip
+
+ENV GEM_HOME vendor/gem_home
+ENV GEM_PATH vendor/gem_home
+ENV RAILS_ENV production
+
+RUN mkdir -p $GEM_HOME
+RUN jruby -S gem install -i $GEM_HOME --no-rdoc --no-ri bundler -v 1.17.3
+RUN bundle config BUNDLE_PATH $GEM_HOME
+RUN bundle config BUNDLE_BIN bin
+RUN bundle config BUNDLE_DISABLE_SHARED_GEMS true
+
+RUN npm install -g yarn