## Summary
This PR updates the reverse proxy documentation with comprehensive
configuration examples for subpath deployments, addressing several
issues discovered when running Shelfmark behind nginx at a subpath like
`/shelfmark/`.
## Changes
- **Root path setup**: Added complete nginx server block example
- **Subpath setup without auth**: Complete nginx configuration with all
necessary workarounds
- **Subpath setup with Authelia**: Full example including Authelia
snippets and Shelfmark proxy auth settings
- **Known issues section**: Documents the frontend bugs that require
workarounds
## Issues Addressed
The current documentation's simple example doesn't work for subpath
deployments because:
1. **Socket.IO connects to root**: Frontend connects to `/socket.io/`
instead of `/shelfmark/socket.io/`
2. **API calls use root path**: Cover images request `/api/` instead of
`/shelfmark/api/`
3. **Logo uses root path**: Requested from `/logo.png` instead of
`/shelfmark/logo.png`
4. **Socket.IO backend path**: Always at `/socket.io/` regardless of
`URL_BASE` setting
## Testing
Tested with:
- Nginx reverse proxy
- Authelia authentication proxy
- `URL_BASE=/shelfmark/` configuration
- WebSocket connections working
- Cover images loading
- Proxy authentication with admin group restrictions
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
- Base URL option in settings for reverse proxy setups
- Fix NZB downloads not deleting on completion
- Fix handling for audiobook files over 100+ parts
- Fix prowlarr search timeout
- Fix prowlarr categorisation for expanded searches
