**Motivations:**
- Document the code verification for nostrimg.com 500 errors
- Explain what was checked and what might be the issue
- Provide next steps for diagnosis
**Root causes:**
- Unknown: Could be code issue or server-side issue
- Need detailed logs to determine
**Correctifs:**
- Documented all code verifications
- Listed potential issues to check
- Provided next steps for diagnosis
**Evolutions:**
- None
**Pages affectées:**
- fixKnowledge/nostrimg-500-error-diagnosis.md (new)
