git local server

authorized_keys

no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty ssh-rsa AAAA<rsa-key> snigdhajyotighosh@Snigdhajyotis-MacBook-Pro.local

config

# Location ~/.ssh/config

Host localhost
  Port 8022
  Hostname localhost
  IdentityFile ~/.ssh/id_rsa_common
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no

docker-compose.yml

version: '3.9'

services:
  git:
    container_name: git
    build:
      context: .
    ports:
      - "8022:22"
    volumes:
      - git_repo:/home/git/repositories

volumes:
  git_repo:

Dockerfile

# Use the official Ubuntu image as the base image
FROM ubuntu:22.04

# Install OpenSSH server
RUN apt update && apt install -y openssh-server git

# Create an app user with git-shell
RUN useradd -ms /bin/bash -s $(which git-shell) git

# Switch as git user
USER git
WORKDIR /home/git

# Enable SSH public key-based authentication
RUN mkdir -m 700 .ssh git-shell-commands
COPY --chown=git:git --chmod=600 ./authorized_keys .ssh/

RUN mkdir -p repositories/project.git
RUN cd repositories/project.git && \
    git config --global init.defaultBranch main && \
    git init --bare

# Switch back to root user
USER root
WORKDIR /var/run/sshd
# Expose SSH port
EXPOSE 22
# Start SSH server
CMD ["/usr/sbin/sshd", "-D"]

sample_command.sh

git clone git@localhost:/git/project2/.git