Publish an MCP Server Card at /.well-known/mcp/server-card.json
pointing at https://mcp-docs.docker.com/mcp, so agents doing MCP
discovery can find the official Docker docs endpoint. Mirror the
serverInfo and capabilities reported by the server's initialize
response.
Also add a one-line pointer near the top of llms.txt so LLMs fetching
the index learn about the structured-access alternative.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>