init

Dockerfile

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+FROM ubuntu:latest
+
+ENV     DEBIAN_FRONTEND=noninteractive
+
+# Install packages
+RUN     apt update && \
+        apt install --no-install-recommends -y \ 
+          nano \
+          openssh-server \
+          openssh-client \
+          rsync \
+          sudo && \
+        rm -rf /var/lib/apt/lists/* 
+
+# User setup
+RUN     useradd -m -d /home/user -s /bin/bash -U -u 1000 user && \
+        mkdir /home/user/.ssh && \
+        chown -R user:user /home/user/.ssh && \
+        mkdir /sftp && \
+        chown root:root /sftp && \
+        chmod 755 /sftp 
+RUN     echo 'user:password' | chpasswd
+
+COPY    authorized_keys /home/user/.ssh/
+COPY    sshd_config ssh_host_* /etc/ssh/
+
+RUN     chown user:user /home/user/.ssh/authorized_keys && \
+        chmod 644 /home/user/.ssh/authorized_keys && \
+        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 && \
+        mkdir /run/sshd     
+
+EXPOSE  22
+
+CMD     ["/usr/sbin/sshd","-D","-e"]