mount ssh folder to be able to use git caddy module with private repo

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The issue mentions mounting an SSH folder to use the git Caddy module with a private repo. Start by examining the Dockerfile and entrypoint scripts in the repository to understand how volumes and SSH configurations are handled. Look for existing examples of volume mounts or SSH agent forwarding in the project. Determine how to securely pass SSH keys into the container and integrate with Caddy's git module. Testing will involve building a custom Docker image and verifying git clone operations work with private repositories.

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