diff --git a/Dockerfile b/Dockerfile
index 02daa8b6..a3e46f4d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,8 @@ FROM ruby:2.4.1
 RUN apt-get update -qq && apt-get install -y build-essential libmysqlclient-dev libcups2-dev libpq-dev nodejs
 RUN mkdir /sxrestaurant
 RUN mkdir -p /sxrestaurant/tmp/puma
-ENV RAILS_ENV production
+ENV RAILS_ENV staging
+ENV RACK_ENV staging
 WORKDIR /sxrestaurant
 COPY Gemfile /sxrestaurant/Gemfile
 COPY Gemfile.lock /sxrestaurant/Gemfile.lock
@@ -10,4 +11,5 @@ RUN bundle install --without development test
 RUN echo "Asia/Rangoon" > /etc/timezone
 RUN dpkg-reconfigure -f noninteractive tzdata
 COPY . /sxrestaurant
-RUN bundle exec rails assets:precompile
+RUN bundle exec rake assets:precompile
+CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
\ No newline at end of file