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

    # Enable gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # Main application location
    # API proxy: All requests to /app-data/* will be forwarded to the Node.js API
    location /app-data/ {
        include /etc/nginx/nginx-auth.conf; # Apply Basic Auth to API

        proxy_pass http://localhost:3000/; # Assuming Node API runs on port 3000
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        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;
    }

    location / {
        include /etc/nginx/nginx-auth.conf; # Apply Basic Auth to the whole site
        try_files $uri $uri/ /index.html;
    }

    # Enable browser caching for static assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
        include /etc/nginx/nginx-auth.conf; # Apply Basic Auth to static assets too
        expires 30d;
        add_header Cache-Control "public, no-transform";
    }

    # Error pages
    error_page 404 /index.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}