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

    # SPA fallback: serve index.html for all non-file routes
    location / {
        try_files $uri $uri/ /index.html;
    }

    # API proxy — target set via CAMELEER_API_URL env var (default: http://cameleer3-server:8081)
    location /api/ {
        proxy_pass         ${CAMELEER_API_URL};
        client_max_body_size 200m;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;

        # SSE support
        proxy_buffering    off;
        proxy_cache        off;
        proxy_read_timeout 86400s;
    }

    # Caching for static assets
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Health check
    location /healthz {
        access_log off;
        return 200 "ok\n";
        add_header Content-Type text/plain;
    }
}