recipes.vllm.ai shortlink doesn't preserve subpaths

[mgoin]

Problem

recipes.vllm.ai redirects to the root page regardless of the subpath. For example:

• recipes.vllm.ai/StepFun/Step-3.5-Flash.html → redirects to docs.vllm.ai/projects/recipes/en/latest/ (root)
• Expected: → docs.vllm.ai/projects/recipes/en/latest/StepFun/Step-3.5-Flash.html

Every subpath returns a blanket 302 Found to the root URL, making it impossible to use recipes.vllm.ai as a shortlink for individual recipe pages.

Fix

Configure recipes.vllm.ai as a custom domain on the ReadTheDocs subproject instead of a simple HTTP redirect. This will serve content directly and preserve paths, so recipes.vllm.ai/StepFun/Step-3.5-Flash.html resolves to the correct page.

[youkaichao]

It seems custom domain does not support subprojects directly https://docs.readthedocs.com/platform/stable/custom-domains.html .