Setup GitHub MCP server for persistent issue management

[0SxD]

Context

gh CLI authenticated (0SxD). Need GitHub MCP server for richer integration.
Requires Docker (also needed for NautilusTrader).
Command: claude mcp add github -e GITHUB_PERSONAL_ACCESS_TOKEN=TOKEN -- docker run -i --rm -e GITHUB_PERSONAL_ACCESS_TOKEN ghcr.io/github/github-mcp-server