docs: revert Railway deployment documentation

Rolled back README.md to remove Railway deployment instructions while keeping the codebase changes intact. This addresses any confusion about deployment methods without breaking existing Railway deployments.

README.md

@@ -9,8 +9,6 @@
 
 A Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Deploy in minutes to give Claude and other AI assistants deep knowledge about n8n's 525+ workflow automation nodes.
 
-[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/new?template=https://github.com/czlonkowski/n8n-mcp)
-
 ## Overview
 
 n8n-MCP serves as a bridge between n8n's workflow automation platform and AI models, enabling them to understand and work with n8n nodes effectively. It provides structured access to:
@@ -209,49 +207,6 @@ Add to Claude Desktop config:
 
 **Restart Claude Desktop after updating configuration** - That's it! 🎉
 
-### Option 4: Railway (Cloud Deployment) ☁️
-
-[Railway](https://railway.app) is a cloud platform that makes deploying applications simple and straightforward. Deploy n8n-MCP with one click:
-
-[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/new?template=https://github.com/czlonkowski/n8n-mcp)
-
-**After deployment:**
-
-1. **Set environment variables** in Railway dashboard:
-   ```
-   AUTH_TOKEN=your-secure-token
-   N8N_API_URL=https://your-n8n-instance.com (optional)
-   N8N_API_KEY=your-api-key (optional)
-   ```
-
-2. **Get your deployment URL** from Railway (e.g., `https://n8n-mcp.up.railway.app`)
-
-3. **Configure Claude Desktop** to use your Railway deployment:
-   ```json
-   {
-     "mcpServers": {
-       "n8n-mcp-remote": {
-         "command": "npx",
-         "args": [
-           "-y",
-           "@modelcontextprotocol/mcp-remote@latest",
-           "connect",
-           "https://your-app.up.railway.app/mcp"
-         ],
-         "env": {
-           "MCP_AUTH_TOKEN": "your-auth-token"
-         }
-       }
-     }
-   }
-   ```
-
-**Notes:**
-- Railway provides automatic HTTPS and scaling
-- The pre-built database (`nodes.db`) is included in the deployment
-- Set AUTH_TOKEN to secure your deployment
-- Railway offers a free tier suitable for personal use
-
 ## 💖 Support This Project
 
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