server {
    listen 3000;
    server_name localhost;

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

    # Gzip Compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml application/json image/svg+xml;

    # Never cache dynamic runtime configuration files or index.html
    location ~* ^/(?:config\.json|env-config\.js|index\.html)$ {
        expires -1;
        add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0";
    }

    # Cache control for static assets (CSS, JS, fonts, images)
    location ~* \.(?:css|js|jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc|woff|woff2|ttf|eot)$ {
        expires 1y;
        access_log off;
        add_header Cache-Control "public, immutable";
    }

    # HTML5 SPA History Mode Support
    location / {
        try_files $uri $uri/ /index.html;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}