Add HTTP transport support for cloud deployment

Enables deployment to cloud platforms (Render, Railway, etc.) while maintaining
backward compatibility with existing stdio transport for Claude Desktop.

New features:
- HTTP server entry point (run_http_server.py) using uvicorn
- Docker containerization with Python 3.13
- Health check endpoint at /health
- Comprehensive deployment documentation for Render, Railway, and Docker

Technical changes:
- Added uvicorn dependency for ASGI server
- Created Dockerfile with optimized multi-stage build (343MB)
- Added .dockerignore for efficient Docker builds
- Implemented /health endpoint using Starlette JSONResponse
- Updated README.md and DEPLOYMENT.md with HTTP deployment guides

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

nadlan_mcp/fastmcp_server.py

@@ -11,6 +11,7 @@ import logging
 from typing import Any, Dict, List, Optional
 
 from mcp.server.fastmcp import FastMCP
+from starlette.responses import JSONResponse
 
 from nadlan_mcp.govmap import GovmapClient
 from nadlan_mcp.govmap.models import Deal
@@ -966,6 +967,18 @@ def get_market_activity_metrics(address: str, years_back: int = 2, radius_meters
         return f"Error analyzing market activity: {str(e)}"
 
 
+# Health check endpoint for HTTP deployments
+@mcp.custom_route("/health", methods=["GET"])
+async def health_check(request):
+    """
+    Health check endpoint for container orchestration platforms (Render, Railway, etc.).
+
+    Returns a simple OK status to indicate the server is running.
+    This endpoint is accessible at GET /health when using HTTP transport.
+    """
+    return JSONResponse({"status": "ok", "service": "nadlan-mcp"})
+
+
 # Run the server
 if __name__ == "__main__":
     mcp.run()