Add Caddy reference card and fix replication tutorial sequence

- Add reference/services/caddy.md with proxy configuration details
- Fix tailscale-setup Next Steps to include core-services
- Fix "BluemeOps" typo in tailscale-setup
- Add Prerequisites link in core-services to tailscale-setup
- Add Caddy to reference index

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/tutorials/replication/core-services.md

@@ -9,6 +9,8 @@ tags:
 # Core Services Setup
 
 > **Audiences:** Replicator
+>
+> **Prerequisites:** [[tutorials/replication/tailscale-setup | Tailscale Setup]]
 
 This tutorial walks through setting up the foundational services that your GitOps infrastructure depends on: a git forge and optionally a container registry.
 

docs/tutorials/replication/tailscale-setup.md

@@ -112,12 +112,12 @@ Tags must be defined in ACLs before use.
 ## Next Steps
 
 With networking established:
+- [[tutorials/replication/core-services | Set Up Core Services]] - Install Forgejo and optionally a container registry
 - [[tutorials/replication/kubernetes-bootstrap | Bootstrap Kubernetes]] - Your cluster will join the tailnet
-- Set up your server and storage devices
 
 ## BlumeOps Specifics
 
-BluemeOps' Tailscale configuration includes:
+BlumeOps' Tailscale configuration includes:
 - Multiple device tags (`homelab`, `nas`, `registry`, `k8s-api`)
 - Group-based access for family members
 - SSH access rules with authentication requirements