## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES
## What kind of change does this PR introduce?
docs update
## What is the new behavior?
Adds 503 troubleshooting doc
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Documentation**
* Added comprehensive troubleshooting guide for Edge Function 503 error
responses, including diagnostic procedures to classify errors into three
categories (app-level, boot-level, and internal failures) with detailed
resolution instructions specific to each error type and links to
complementary resources.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Chris Chinchilla <chris.ward@supabase.io>