MySQL 5.7, asdf, Ruby 2.7.7

Dockerfile

FROM mysql:5.7.37-debian

#install ruby
RUN apt update
RUN apt install -y git
RUN git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.11.1
RUN . "/root/.asdf/asdf.sh"
RUN asdf plugin add ruby https://github.com/asdf-vm/asdf-ruby.git
RUN apt install -y wget
RUN apt-get -y install make
RUN apt-get -y install gcc
RUN apt-get -y install libz-dev
RUN apt-get -y install bzip2
RUN asdf install ruby 2.7.7
RUN apt-get install rubygems build-essential
RUN asdf reshim ruby
RUN asdf global ruby 2.7.7
RUN apt install -y default-libmysqlclient-dev
RUN gem install bundler -v 2.1.4

CMD ["bash"]