working

Dockerfile

@@ -1,13 +1,36 @@
 FROM ubuntu:latest
 
-RUN apt update && apt install  openssh-server sudo scp -y
+ENV     DEBIAN_FRONTEND=noninteractive
 
-RUN useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 test 
+RUN     apt update && \
+        apt install --no-install-recommends -y \ 
+          nano \
+          openssh-server \
+          openssh-client \
+          rsync \
+          sudo && \
+        rm -rf /var/lib/apt/lists/* && \
+        useradd -m -d /home/user -s /bin/bash -U -G sudo -u 1000 user && \
+        echo 'user ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers && \
+        mkdir /home/user/.ssh/
 
-RUN  echo 'test:test' | chpasswd
+COPY    authorized_keys config id_ed25519 id_ed25519.pub known_hosts /home/user/.ssh/
+COPY    sshd_config ssh_host_ed25519_key ssh_host_ed25519_key.pub /etc/ssh/
 
-RUN service ssh start
+RUN     chown -R user:user /home/user/.ssh && \
+        chmod 644 /home/user/.ssh/authorized_keys && \
+        chmod 600 /home/user/.ssh/config && \
+        chmod 600 /home/user/.ssh/id_ed25519 && \
+        chmod 600 /home/user/.ssh/id_ed25519.pub && \
+        chmod 600 /home/user/.ssh/known_hosts
 
-EXPOSE 22
+RUN     chown root:root /etc/ssh/* && \
+        chmod 644 /etc/ssh/sshd_config && \
+        chmod 600 /etc/ssh/ssh_host_ed25519_key && \
+        chmod 644 /etc/ssh/ssh_host_ed25519_key.pub      
 
-CMD ["/usr/sbin/sshd","-D"]
+RUN     service ssh start
+
+EXPOSE  22
+
+CMD     ["/usr/sbin/sshd","-D"]