Dockerfile

FROM alpine:latest

ARG user=bit

COPY nodeUP config /

RUN apk update && apk upgrade && apk add bash \
		bash-completion \
		openssh \
		curl \
		&& rm -f /var/cache/apk/* \
		&& passwd -d root && adduser -D -s /bin/bash $user && passwd -u $user && chown -R $user:$user /home/$user \
		&& sed -i -e 's/#PermitRootLogin.*/PermitRootLogin\ no/g' -e 's/#PasswordAuthentication.*/PasswordAuthentication\ no/g' /etc/ssh/sshd_config \
		&& mv /nodeUP /home/$user/nodeUP && mv /config /home/$user/.nodes.myconfig \
		&& chmod +x /home/$user/nodeUP && chmod 600 /home/$user/.nodes.myconfig \
		&& chown $user:$user /home/$user/nodeUP && chown $user:$user /home/$user/.nodes.myconfig \
		&& su $user -c "touch /home/$user/.bashrc && /home/$user/nodeUP && rm /home/$user/nodeUP" \
		&& echo "#!/bin/sh" >> /entry.sh && echo "ssh-keygen -A" >> /entry.sh && echo "/usr/sbin/sshd -D -e" >> entry.sh && chmod +x /entry.sh

EXPOSE 22/tcp
#EXPOSE 22/udp

ENTRYPOINT /entry.sh