Dockerfile

# Use ubuntu as the base image
FROM ubuntu

# Install and enable SSH service
RUN apt-get update && apt-get install -y openssh-server
RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# Set a password for the root user
RUN echo "root:Changeme" | chpasswd

# Create the sshuser account lol
RUN useradd -m -s /bin/bash sshuser

# Create and change ownership of the /run/sshd directory
USER root
RUN mkdir /run/sshd
RUN chown sshuser:sshuser /run/sshd
USER sshuser

# Expose the SSH port
EXPOSE 22

# Start the SSH service and run bash as the foreground process
ENTRYPOINT service ssh start && bash