nostarch.com | 502: Bad gateway

<!DOCTYPE html>     <html class="no-js" lang="en-US">  <head> <title>nostarch.com | 502: Bad gateway</title> <meta charset="UTF-8" /> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta name="robots" content="noindex, nofollow" /> <meta name="viewport" content="width=device-width,initial-scale=1" /> <link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/main.css" /> </head> <body> <div id="cf-wrapper"> <div id="cf-error-details" class="p-0"> <header class="mx-auto pt-10 lg:pt-6 lg:px-8 w-240 lg:w-full mb-8"> <h1 class="inline-block sm:block sm:mb-2 font-light text-60 lg:text-4xl text-black-dark leading-tight mr-2"> <span class="inline-block">Bad gateway</span> <span class="code-label">Error code 502</span> </h1> <div> Visit <a href="https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=nostarch.com" target="_blank" rel="noopener noreferrer">cloudflare.com</a> for more information. </div> <div class="mt-3">2025-03-19 16:50:31 UTC</div> </header> <div class="my-8 bg-gradient-gray"> <div class="w-240 lg:w-full mx-auto"> <div class="clearfix md:px-8"> <div id="cf-browser-status" class=" relative w-1/3 md:w-full py-15 md:p-0 md:py-8 md:text-left md:border-solid md:border-0 md:border-b md:border-gray-400 overflow-hidden float-left md:float-none text-center"> <div class="relative mb-10 md:m-0"> <span class="cf-icon-browser block md:hidden h-20 bg-center bg-no-repeat"></span> <span class="cf-icon-ok w-12 h-12 absolute left-1/2 md:left-auto md:right-0 md:top-0 -ml-6 -bottom-4"></span> </div> <span class="md:block w-full truncate">You</span> <h3 class="md:inline-block mt-3 md:mt-0 text-2xl text-gray-600 font-light leading-1.3"> Browser </h3> <span class="leading-1.3 text-2xl text-green-success">Working</span> </div> <div id="cf-cloudflare-status" class=" relative w-1/3 md:w-full py-15 md:p-0 md:py-8 md:text-left md:border-solid md:border-0 md:border-b md:border-gray-400 overflow-hidden float-left md:float-none text-center"> <div class="relative mb-10 md:m-0"> <a href="https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=nostarch.com" target="_blank" rel="noopener noreferrer"> <span class="cf-icon-cloud block md:hidden h-20 bg-center bg-no-repeat"></span> <span class="cf-icon-ok w-12 h-12 absolute left-1/2 md:left-auto md:right-0 md:top-0 -ml-6 -bottom-4"></span> </a> </div> <span class="md:block w-full truncate">Singapore</span> <h3 class="md:inline-block mt-3 md:mt-0 text-2xl text-gray-600 font-light leading-1.3"> <a href="https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=nostarch.com" target="_blank" rel="noopener noreferrer"> Cloudflare </a> </h3> <span class="leading-1.3 text-2xl text-green-success">Working</span> </div> <div id="cf-host-status" class="cf-error-source relative w-1/3 md:w-full py-15 md:p-0 md:py-8 md:text-left md:border-solid md:border-0 md:border-b md:border-gray-400 overflow-hidden float-left md:float-none text-center"> <div class="relative mb-10 md:m-0"> <span class="cf-icon-server block md:hidden h-20 bg-center bg-no-repeat"></span> <span class="cf-icon-error w-12 h-12 absolute left-1/2 md:left-auto md:right-0 md:top-0 -ml-6 -bottom-4"></span> </div> <span class="md:block w-full truncate">nostarch.com</span> <h3 class="md:inline-block mt-3 md:mt-0 text-2xl text-gray-600 font-light leading-1.3"> Host </h3> <span class="leading-1.3 text-2xl text-red-error">Error</span> </div> </div> </div> </div> <div class="w-240 lg:w-full mx-auto mb-8 lg:px-8"> <div class="clearfix"> <div class="w-1/2 md:w-full float-left pr-6 md:pb-10 md:pr-0 leading-relaxed"> <h2 class="text-3xl font-normal leading-1.3 mb-4">What happened?</h2> <p>The web server reported a bad gateway error.</p> </div> <div class="w-1/2 md:w-full float-left leading-relaxed"> <h2 class="text-3xl font-normal leading-1.3 mb-4">What can I do?</h2> <p class="mb-6">Please try again in a few minutes.</p> </div> </div> </div> <div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300"> <p class="text-13"> <span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">922e781f7ea001b4</strong></span> <span class="cf-footer-separator sm:hidden">•</span> <span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1"> Your IP: <button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button> <span class="hidden" id="cf-footer-ip">8.222.208.146</span> <span class="cf-footer-separator sm:hidden">•</span> </span> <span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing?utm_source=errorcode_502&utm_campaign=nostarch.com" id="brand_link" target="_blank">Cloudflare</a></span> </p> 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nostarch.com | 502: Bad gateway