initial commit

Dockerfile

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+FROM debian:buster-slim
+
+RUN apt update && \
+    apt upgrade -y && \
+    apt -y install openssh-server && \
+    rm -rf /var/lib/apt/lists/* && \
+    mkdir -p /run/sshd
+
+COPY sshd_config /etc/ssh/sshd_config
+COPY entrypoint /
+
+EXPOSE 22
+
+ENTRYPOINT ["/entrypoint"]
+

entrypoint

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+#!/bin/bash
+exec /usr/sbin/sshd -D -e
+

sshd_config

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+HostKey /etc/ssh/ssh_host_rsa_key
+HostKey /etc/ssh/ssh_host_ecdsa_key
+HostKey /etc/ssh/ssh_host_ed25519_key
+SyslogFacility AUTHPRIV
+PermitRootLogin no
+AuthorizedKeysFile	.ssh/authorized_keys
+PasswordAuthentication yes
+ChallengeResponseAuthentication no
+GSSAPIAuthentication yes
+GSSAPICleanupCredentials no
+UsePAM yes
+X11Forwarding no
+PrintMotd no
+AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
+AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
+AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
+AcceptEnv XMODIFIERS
+Subsystem	sftp	/usr/libexec/openssh/sftp-server
+Match Group sftponly
+	ChrootDirectory /srv
+        ForceCommand internal-sftp
+        AllowTcpForwarding no
+	X11Forwarding no
+	
+Match Group extsftponly
+	ChrootDirectory %h
+        ForceCommand internal-sftp
+        AllowTcpForwarding no
+	X11Forwarding no
+