sshd docker container that allows no password login

Dockerfile

FROM debian:stretch-slim

RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:root' | chpasswd
RUN useradd -m test
RUN passwd -d test
RUN sed -i'' -e's/^#PermitRootLogin prohibit-password$/PermitRootLogin yes/' /etc/ssh/sshd_config \
        && sed -i'' -e's/^#PasswordAuthentication yes$/PasswordAuthentication yes/' /etc/ssh/sshd_config \
        && sed -i'' -e's/^#PermitEmptyPasswords no$/PermitEmptyPasswords yes/' /etc/ssh/sshd_config \
        && sed -i'' -e's/^UsePAM yes/UsePAM no/' /etc/ssh/sshd_config
EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]