Add more data in pages

frontend/src/routes/+page.svelte

@@ -1,4 +1,4 @@
-<h1>Welcome to the City Portal</h1>
+<h1>Welcome to the City Portal!</h1>
 
 <ul>
 <li><a href="datasets/">List of datasets</a></li>

frontend/src/routes/datasets/[id]/+page.svelte

@@ -7,6 +7,8 @@
     const recordData = JSON.parse(data.record.data);
 </script>
 
+<h1>Data for record id: {data.record.id}</h1>
+
 <ul>
 {#each Object.entries(recordData) as [key, value]}
   <li>{key}: {value}</li>