fixa aumento no serial do soa

internal/server/templates/zones.html

@@ -34,6 +34,7 @@
               <td>{{ .Serial }}</td>
               <td>
                 <form method="post" action="/zones/{{ .ID }}/delete">
+                  <input type="hidden" name="csrf_token" value="{{ $.CSRFToken }}">
                   <button class="btn btn-outline-danger btn-sm" type="submit">Delete</button>
                 </form>
               </td>
@@ -55,6 +56,7 @@
       </div>
       <div class="card-body">
         <form method="post" action="/zones">
+          <input type="hidden" name="csrf_token" value="{{ .CSRFToken }}">
           <div class="mb-3">
             <label class="form-label">Zone name</label>
             <input class="form-control" name="name" placeholder="example.org." required>