Change login form to an actual form

frontend/src/routes/login/+page.svelte

@@ -46,6 +46,7 @@
       <div class="card-body">
         <h1 class="text-2xl font-bold">{$i18n.t('login:title')}</h1>
         <p class="py-2 text-base">{$i18n.t('login:text')}</p>
+        <form onsubmit={login}>
           <fieldset class="fieldset">
             <label class="fieldset-label input text-base-content">
               <i class="bi bi-envelope-at"></i>
@@ -60,8 +61,9 @@
                 required
               />
             </label>
-          <button class="btn btn-primary mt-4" onclick={login}>{$i18n.t('login:button')}</button>
+            <input type="submit" class="btn btn-primary mt-4" value={$i18n.t('login:button')} />
           </fieldset>
+        </form>
       </div>
     </div>
   </div>