Fix Dockerfile to create directory with -p flag for sshd

Author: Xpirix

deployment/docker/Dockerfile

@@ -57,7 +57,7 @@ FROM prod as dev
 # https://docs.docker.com/examples/running_ssh_service/
 # Sudo is needed by pycharm when it tries to pip install packages
 RUN apt-get update && apt-get install -y openssh-server sudo
-RUN mkdir /var/run/sshd
+RUN mkdir -p /var/run/sshd
 RUN echo 'root:docker' | chpasswd
 RUN echo "PermitRootLogin yes" >> /etc/ssh/sshd_config