diff --git a/Dockerfile-ruby b/Dockerfile-ruby
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+FROM ubuntu:20.04
+RUN apt-get update
+# basics 
+RUN apt-get install -y libssl-dev curl libmysqlclient-dev imagemagick nodejs mysql-server redis-server tzdata
+RUN ln -fs /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
+# confirm openssl version
+RUN openssl version
+RUN which openssl
+# install RVM, Ruby, and Bundler
+RUN \curl -L https://get.rvm.io | bash -s stable
+RUN /bin/bash -l -c "rvm requirements"
+# replace ruby mirror url, accelerate install ruby
+RUN sed -i 's/rvm_remote_server_url2/#rvm_remote_server_url2/g' /usr/local/rvm/config/db
+RUN sed -i 's/cache.ruby-lang.org/cache.ruby-china.com/g' /usr/local/rvm/config/db
+# install ruby
+RUN /bin/bash -l -c "rvm install 2.4.5"
+# confirm ruby version
+RUN /bin/bash -l -c "rvm list"
+RUN /bin/bash -l -c "ruby -v"