Add discover page

src/app/components/InfoNip29.svelte

@@ -20,9 +20,9 @@
     If you do decide to join someone else's, make sure to follow their directions for registering
     as a user.
   </p>
-  <div class="card flex-row justify-between">
-    devrelay.highlighter.com
-    <Button on:click={() => clip('devrelay.highlighter.com')}>
+  <div class="card2 flex-row justify-between">
+    groups.fiatjaf.com
+    <Button on:click={() => clip('groups.fiatjaf.com')}>
       <Icon icon="copy" />
     </Button>
   </div>

src/app/components/SpaceAdd.svelte

@@ -18,7 +18,7 @@
   <CardButton icon="add-circle" title="Get started" on:click={startCreate}>
     Just a few questions and you'll be on your way.
   </CardButton>
-  <div class="card column gap-4">
+  <div class="card2 column gap-4">
     <h2 class="subheading">Have an invite?</h2>
     <Button class="btn btn-primary" on:click={startJoin}>
       Join a Space