fixed end of line 12

need to add  \ at line 12, otherwise && will be considered as un-recongonized command

Author: hopewise

Dockerfile

@@ -9,7 +9,7 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install openssh-
 ADD set_root_pw.sh /set_root_pw.sh
 ADD run.sh /run.sh
 RUN chmod +x /*.sh
-RUN mkdir -p /var/run/sshd && sed -i "s/UsePrivilegeSeparation.*/UsePrivilegeSeparation no/g" /etc/ssh/sshd_config
+RUN mkdir -p /var/run/sshd && sed -i "s/UsePrivilegeSeparation.*/UsePrivilegeSeparation no/g" /etc/ssh/sshd_config \
   && sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config \
   && touch /root/.Xauthority \
   && true