FROM alpine:latest

RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories

RUN apk update && apk add --no-cache openssh-server openssh-sftp-server&& \

    sed -i "s/#PermitRootLogin.*/PermitRootLogin yes/g" /etc/ssh/sshd_config && \

    ssh-keygen -t rsa -P "" -f /etc/ssh/ssh_host_rsa_key && \

    ssh-keygen -t ecdsa -P "" -f /etc/ssh/ssh_host_ecdsa_key && \

    ssh-keygen -t ed25519 -P "" -f /etc/ssh/ssh_host_ed25519_key && \

    echo "root:admin" | chpasswd

EXPOSE 22

CMD ["/usr/sbin/sshd", "-D"]