Changes

Fix production deployment with /juntete prefix

- Update FastAPI to use root_path="/juntete" for proper OpenAPI docs
- Update Next.js rewrites to forward to /juntete/api endpoints
- Fix frontend Dockerfile to build production Next.js app
- Keep Nginx rewrite rule for /juntete/api -> /api translation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Fix API base URL to default to /juntete prefix

- Changed NEXT_PUBLIC_BASE_PATH default from empty string to '/juntete'
- This ensures API calls go to /juntete/api/* instead of /api/*
- Fixes 404 errors when creating trips in production

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>