server {
    listen 80;

    root /usr/share/nginx/html;
    index index.html;

    location /api/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 3600;
    }

    location /api/ {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_read_timeout 3600;
    }

    location /static/ {
        proxy_pass http://backend:8000/static/;
        proxy_set_header Host $host;
    }

    # Native app APK for sideloading (bundled by scripts/build-apk.mjs release).
    # Real 404 when absent - never fall through to index.html.
    location /downloads/ {
        types { application/vnd.android.package-archive apk; }
        add_header Cache-Control "no-cache";
        try_files $uri =404;
    }

    location / {
        try_files $uri $uri/ /index.html;
    }
}