use the baseurl for the call

templates/base.html

@@ -74,7 +74,8 @@
         }
 
         function subscribeUser(registration) {
-            fetch('http://localhost:3001/vapid-public-key')
+            const baseUrl = '{{ config.BASE_URL }}'.replace(/\/$/, ""); // Remove trailing slash if present
+            fetch(`${baseUrl}/vapid-public-key`)
                 .then(response => response.json())
                 .then(data => {
                     const applicationServerKey = urlB64ToUint8Array(data.public_key);
@@ -91,7 +92,8 @@
         }
 
         function saveSubscription(subscription) {
-            fetch('/save-subscription', {
+            const baseUrl = '{{ config.BASE_URL }}'.replace(/\/$/, ""); // Remove trailing slash if present
+            fetch(`${baseUrl}/save-subscription`, {
                 method: 'POST',
                 headers: {
                     'Content-Type': 'application/json',