Update private self hosted apps to call out how someone could route for public IP/Hostname based applications

[kennyj42]

Summary

Some customers treat their "public" IP ranges as completely private and want to create Access applications. This adds a call out to denote how to properly set that up.

Screenshots (optional)

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• The change adheres to the documentation style guide.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/cloudflare-one/applications/	@kennyj42, @ranbel, @cloudflare/pcx-technical-writing
*	@cloudflare/pcx-technical-writing

[github-actions]

This PR requires additional review attention because it affects the following areas:

Partials

This PR updates partial files, which are pieces of content used across multiple files in our Render component.

• cloudflare-one/access/self-hosted-app/generic-public-app - view affected files

[github-actions]

Preview URL: https://2600f3d1.preview.developers.cloudflare.com
Preview Branch URL: https://kennyj42-patch-4.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/cloudflare-one/applications/non-http/self-hosted-private-app/	https://kennyj42-patch-4.preview.developers.cloudflare.com/cloudflare-one/applications/non-http/self-hosted-private-app/