Summary

I clarified the S3-compatible storage docs so custom AWS_ENDPOINT_URL values show a full URL with a scheme, matching the IDrive e2 workaround from danny-avila/LibreChat#13312.

• Updated the S3 configuration example to use https://your_endpoint_url instead of a bare hostname.
• Added IDrive e2 to the S3-compatible provider guidance and warned that missing http:// or https:// can cause Invalid URL during file streaming.
• Updated the .env option table to show the same fully qualified endpoint pattern.

Refs danny-avila/LibreChat#13312.
Refs danny-avila/librechat-agent-triage-reports#20.

Change Type

• Documentation update

Testing

• Ran pnpm exec prettier --check content/docs/configuration/cdn/s3.mdx content/docs/configuration/dotenv.mdx.
• Ran pnpm build.

Test Configuration:

• macOS
• Existing local checkout dependencies
• Next.js 16.1.6 production build

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have made pertinent documentation changes
• My changes do not introduce new warnings