Add Such Software footer credit

sites/ampgateway-online/index.html

@@ -261,6 +261,7 @@
     <footer class="site-footer">
       <p>AMPGateway is the public visual companion for Adaptive Multi-Protocol Gateway.</p>
       <p>Static-first. Transport-aware. Operator-reviewable.</p>
+      <p>Developed and deployed here by <a href="https://such.software">Such Software</a>.</p>
     </footer>
   </body>
 </html>

sites/ampgateway-online/styles.css

@@ -550,6 +550,17 @@ h3 {
   margin: 0;
 }
 
+.site-footer a {
+  color: var(--teal);
+  font-weight: 800;
+  text-decoration: none;
+}
+
+.site-footer a:hover,
+.site-footer a:focus-visible {
+  text-decoration: underline;
+}
+
 @media (max-width: 960px) {
   .top-nav {
     display: none;