Add instructions for restoring original visitor IPs when using Caddy

[dannyferguson]

Summary

This adds a section to the Restoring Visitor IPs documentation for the Caddy web server/reverse proxy.

Caddy is an increasingly popular alternative to Nginx and Apache which already have guides on there so I figured as I had to do my research to be able to handle the problem, that I'd share my solution with other users potentially seeking to solve the same problem.

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.

[dannyferguson]

Had forgotten to include the ipv6 ranges in the remote_ip matcher hence the force push. Everything should be good now

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PR Change Summary

Added instructions for configuring Caddy to restore original visitor IPs when using Cloudflare.

• Introduced a new section for Caddy in the visitor IP restoration documentation.
• Provided configuration examples for handling the CF-Connecting-IP header.
• Included guidance on restricting access to Cloudflare IP addresses.

Modified Files

• src/content/docs/support/troubleshooting/restoring-visitor-ips/restoring-original-visitor-ips.mdx

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