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

    # gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 256;
    gzip_types text/plain text/css text/javascript application/javascript
               application/json application/xml image/svg+xml font/woff2;

    # Cache immutable static assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2?|ttf|eot|webp)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Cache JSON data for 1 hour
    location ~* \.json$ {
        expires 1h;
        add_header Cache-Control "public, max-age=3600";
        try_files $uri =404;
    }

    # SPA routing fallback
    location / {
        try_files $uri $uri/ /index.html;
    }
}