fix:README.md

[yanboishere]

已修改

[Mongkol67]

RUN apt-get update && \ apt-get install -y --no-install-recommends \ gcc g++ libtool libffi-dev libcurl4-openssl-dev libpq-dev libbz2-dev libc6-dev \ libevent-dev libgmp-dev liblzma-dev libncurses5-dev libncursesw5-dev \ libreadline-dev libsqlite3-dev libssl-dev libxml2-dev libyaml-dev zlib1g-dev \ curl git \ libpq5 openssl gettext && \ python setup-docker.py && \ apt-get purge --autoremove -y \ gcc g++ libtool libffi-dev libcurl4-openssl-dev libpq-dev libbz2-dev libc6-dev \ libevent-dev libgmp-dev liblzma-dev libncurses5-dev libncursesw5-dev \ libreadline-dev libsqlite3-dev libssl-dev libxml2-dev libyaml-dev zlib1g-dev \ curl git && \ rm -rf /var/lib/apt/lists/*