diff --git a/ruby_on_rails-postgres/web/Dockerfile b/ruby_on_rails-postgres/web/Dockerfile
index d14c4df..7c32753 100644
--- a/ruby_on_rails-postgres/web/Dockerfile
+++ b/ruby_on_rails-postgres/web/Dockerfile
@@ -3,6 +3,11 @@ FROM ruby:2.6.5
 # install nodejs / libdev / postgres-client
 RUN apt-get update -qq && apt-get install -y nodejs libpq-dev postgresql-client
 
+## install yarn
+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 -y yarn && rm -rf /var/lib/apt/lists/*
+
 RUN mkdir /myapp
 WORKDIR /myapp
 COPY Gemfile /myapp/Gemfile
@@ -13,14 +18,8 @@ RUN gem install bundler:2.0.2
 RUN bundle install
 COPY . /myapp
 
-## install yarn
-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 -y yarn && rm -rf /var/lib/apt/lists/*
-
-
 ## Add Endpoint
 COPY entrypoint.sh /usr/bin/
 RUN chmod +x /usr/bin/entrypoint.sh
 ENTRYPOINT ["entrypoint.sh"]
-EXPOSE 3000
\ No newline at end of file
+EXPOSE 3000