upstream backend {
    server 100.66.170.15:8080
    server 127.0.0.1:5218
    server 172.18.10.8:8080
}
server {
    listen 80;
   
    root /usr/share/nginx/html;
    # Default file to serve for directory requests
    index index.html index.htm;

    location / {
        # Try to serve the requested file directly ($uri)
        # If it's a directory, try serving the index file ($uri/)
        # If neither exists, fall back to serving /index.html
        try_files $uri $uri/ /index.html;
    }

    # Optional: Add cache control headers for static assets for better performance
    location ~* \.(?:css|js|jpg|jpeg|gif|png|ico|svg|webp)$ {
        expires 1y;
        add_header Cache-Control "public";
        access_log off; # Optional: Don't log accesses for static files
    }

    location /api/ {
        proxy_pass http://backend_api;

        # CORS headers
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization' always;

        if ($request_method = OPTIONS) {
            return 204;
        }
    }
}