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

    # SPA fallback: all paths serve index.html with no-cache
    location / {
        try_files $uri $uri/ /index.html;
        add_header Cache-Control "no-store, no-cache, must-revalidate";
    }

    # Hashed static assets: cache forever (filename changes on rebuild)
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    location /api/ {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    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;
    }
}