Create a sitemap and fix copy in a few places

404.html

@@ -35,19 +35,17 @@ <h1>Resource Not Found (<span class="orange">404</span>)</h1>
       the browser, this means the URL is not recognized. In an API, this can also mean that the endpoint is valid but
       the resource itself does not exist. Servers may also send this response instead of 403 to hide the existence of a
       resource from an unauthorized client. This response code is probably the most famous one due to its frequent
-      occurrence on the web. <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Status">Read more about status codes.</a>
+      occurrence on the web. 
     </p>
+    <p><a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Status">Read more about status codes.</a></p>
     <p>Are you looking for one of these pages instead?</p>
     <h2>Site Map</h2>
     <ul>
-      <li><a href="learn.html">Learn</a>: a single page tutorial that takes you from a neophyte to an intermediate
-        understanding of HTML</li>
-      <li><a href="practice.html">Practice</a>: with a memorization tool to help you remember all of the HTML tags
-        available</li>
-      <li><a href="reference.html">Reference</a>: for broadly supported HTML elements with their syntax, sample code,
-        and reusable templates</li>
-      <li><a href="tools.html">Tools</a>: to help you write better, faster, and stronger HTML by validating and
-        generating it correctly</li>
+      <li><a href="learn.html">Learn</a>: a single page tutorial covering neophyte to intermediate HTML</li>
+      <li><a href="practice.html">Practice</a>: with a memorization tool to help you remember all of the HTML elements</li>
+      <li><a href="reference.html">Reference</a>: for broadly supported HTML elements with their syntax, sample code, and templates</li>
+      <li><a href="tools.html">Tools</a>: to help you write better, faster, and stronger HTML</li>
+      <li><a href="about.html">About</a>: the story behind HTML.Haus</li>
     </ul>
   </main>
   <footer>

index.html

@@ -53,8 +53,9 @@ <h2>HTML</h2>
     <h2 lang="de">Haus</h2>
     <p>
       <span lang="de">Haus</span> is the German word for house. It comes from Middle High German hūs (pronounced
-      /haʊ̯s/). You can hear it here:
+      /haʊ̯s/). 
     </p>
+    <p>You can hear it here:</p>
     <audio controls>
       <source src="assets/De-Haus.ogg" type="audio/ogg">
       Your browser does not support the audio element.
@@ -95,7 +96,7 @@ <h2>Background</h2>
       HTML matters, and when to properly
       use elements for great justice.
     </p>
-    <p>HTML.Haus harkens back to web development fundamentals by offering resources for writing better HTML.</p>
+    <p>HTML.Haus harkens back to web development fundamentals by offering resources for writing HTML.</p>
   </main>
   <footer>
     <a href="learn.html">Learn</a>

robots.txt

@@ -0,0 +1,6 @@
+# Allow crawling of all content
+User-agent: *
+Disallow:
+
+# Sitemap location
+Sitemap: https://html.haus/sitemap.xml

sitemap.txt

@@ -0,0 +1,6 @@
+https://html.haus/
+https://html.haus/learn.html
+https://html.haus/practice.html
+https://html.haus/reference.html
+https://html.haus/tools.html
+https://html.haus/about.html

sitemap.xml

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns:video="http://www.google.com/schemas/sitemap-video/1.1"><url><loc>https://html.haus/</loc></url><url><loc>https://html.haus/learn.html</loc></url><url><loc>https://html.haus/practice.html</loc></url><url><loc>https://html.haus/reference.html</loc></url><url><loc>https://html.haus/tools.html</loc></url><url><loc>https://html.haus/about.html</loc></url></urlset>