Update to include tailscale subnet router node.

Author: michaelhodges

README.md

@@ -90,6 +90,8 @@ A huge thank you to all our contributors! ScaleTail wouldn’t be what it is tod
 | 🔒 **Technitium DNS**      | An open-source DNS server that can be used for self-hosted DNS services.        | [Details](services/technitium)          |
 | 🌐 **Traefik**             | A modern reverse proxy and load balancer for microservices.                     | [Details](services/traefik)             |
 | 🚀 **Tailscale Exit Node** | Configure a device to act as an exit node for your Tailscale network.           | [Details](services/tailscale-exit-node) |
+| 🌐 **Tailscale Subnet Router Node** | Configure a device to act as a subnet router node for your Tailscale network.   | [Details](services/tailscale-subnet-router-node) |
+
 
 ### 🎥 Media and Entertainment