feat: Add domain sorting and fixed a few ui bugs

templates/index.html

@@ -137,9 +137,9 @@
     <table class="table">
         <thead>
             <tr>
-                <th>Domain</th>
-                <th>Expires</th>
-                <th>Price Paid</th>
+                <th><a href="/?direction={{sort_domain_next}}">Domain{{sort_domain}}</a></th>
+                <th><a href="/?sort=expiry&direction={{sort_expiry_next}}">Expires{{sort_expiry}}</a></th>
+                <th><a href="/?sort=price&direction={{sort_price_next}}">Price Paid{{sort_price}}</a></th>
                 <th></th>
             </tr>
         </thead>