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+FROM alpine:3.19
+
+# Install OpenSSH server and git
+RUN apk add --no-cache openssh git
+
+# Create git user with UID 1000 and set git-shell as login shell
+# This restricts the user to git operations only
+RUN adduser -D -u 1000 -s /usr/bin/git-shell git && \
+    mkdir -p /home/git/.ssh /repos && \
+    chown -R git:git /home/git /repos
+
+# Generate SSH host keys
+# These will be regenerated if not persisted via volume mount
+RUN ssh-keygen -A
+
+# Copy sshd configuration
+COPY sshd_config /etc/ssh/sshd_config
+
+# Expose SSH port
+EXPOSE 22
+
+# Run SSH daemon in foreground with error logging to stderr
+CMD ["/usr/sbin/sshd", "-D", "-e"]