Dockerfile with nopassword ssh for Ubuntu

gistfile1.txt

FROM ubuntu

# install necessory packages
RUN apt-get update
RUN apt-get install ssh -y
RUN apt-get install openssh-server -y
RUN apt-get install sudo -y
RUN apt-get install vim -y
RUN apt-get install curl -y
RUN apt-get install python-software-properties -y
RUN apt-get install software-properties-common -y
RUN add-apt-repository ppa:nginx/stable -y
RUN mkdir -p /var/run/sshd

# create user for ssh
RUN useradd -d /home/yosuke -m yosuke
RUN passwd -d -u yosuke

# setting ssh key
RUN mkdir -p /home/yosuke/.ssh
RUN chown yosuke /home/yosuke/.ssh
RUN chmod 700 /home/yosuke/.ssh
ADD ./authorized_keys /home/yosuke/.ssh/
RUN chown yosuke /home/yosuke/.ssh/authorized_keys
RUN chmod 600 /home/yosuke/.ssh/authorized_keys

# allow sudo without password
RUN echo "yosuke ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

EXPOSE 22