server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    # API proxy → FastAPI backend
    location /api/ {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    # WebSocket proxy → FastAPI backend
    location /ws/ {
        proxy_pass http://backend:8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_read_timeout 3600s;
    }

    # Vue Router — all other paths serve index.html (SPA fallback)
    location / {
        try_files $uri $uri/ /index.html;
    }
}