Migrate CDN integration and troubleshooting guides from support

[jamie-at-bunny]

Bring CMS, storage, and troubleshooting content from support.bunny.net into the docs and retire the redirect stubs.

CMS integrations

• migrate Drupal, TYPO3, Shopware, PrestaShop, Magento, Discourse, and ExpressionEngine; add Joomla as a new page (no prior stub) with a nav entry.

Storage migratioins

• migrate Amazon S3, Azure Blob, Backblaze, DigitalOcean Spaces, OVH, and Wasabi; each links to Bunny Storage and the S3-compatible API (beta).

Troubleshooting

• folded the support articles into the relevant feature docs
  instead of standalone pages
• origin redirect loops and 502/504 errors into Connectivity, low cache hit rate and video seeking into Smart Cache,
  the Disable Cookies note into Vary Cache, and Let's Encrypt issuance into SSL setup.
• Removed the six emptied stub pages, trim the troubleshooting nav, and add docs.json redirects to the new anchors.

[mintlify]

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Project	Status	Preview	Updated (UTC)
bunny	🟢 Ready	View Preview	Jun 23, 2026, 11:18 AM

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