nginx.conf

server {
  listen 5000;
  root /usr/share/nginx/html;

  location / {
    # Serve only WebP images
    types {
      image/webp      webp;
    }
    default_type      image/webp;

    # Serve the WebP image if it exists, otherwise fall back to the original image
    try_files         $uri =404;

    # Set caching headers
    expires           1y;
    add_header        Cache-Control "public";
  }

  location /handler {
    # Pass requests to the Go API running on localhost:3000
    proxy_pass http://localhost:3000;

    # Set headers to forward the original host and IP
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;

    # Set up buffering for performance tuning
    proxy_buffering on;
    proxy_buffer_size 1m;
    proxy_buffers 8 1m;
    proxy_busy_buffers_size 1m;
    proxy_max_temp_file_size 0;
    proxy_read_timeout 300s;

    # performance tuning for client
    client_body_buffer_size 1M;
  }

  server_tokens off;
  add_header X-Frame-Options "SAMEORIGIN";
  add_header X-Content-Type-Options nosniff;
  gzip on;

  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_min_length 0;
  gzip_types image/webp;
}