Add newsletter page

src/components/content/blog.astro

@@ -16,7 +16,7 @@ posts.sort((a, b) => new Date(b.frontmatter.date).valueOf() - new Date(a.frontma
             guides, and Patreon member articles for free.
         </p>
 
-        <a href="/join" class="btn">Subscribe</a>
+        <a href="/newsletter" class="btn">Subscribe</a>
     </section>
 
     <h1>Blog Posts</h1>

src/pages/newsletter.astro

@@ -0,0 +1,26 @@
+<div style="text-align: left" class="sender-form-field" data-sender-form-id="m0w9xt4nav2qymk3ber"></div>
+
+<script lang="javascript" is:inline>
+  (function (s, e, n, d, er) {
+    s['Sender'] = er;
+    s[er] = s[er] || function () {
+      (s[er].q = s[er].q || []).push(arguments)
+    }, s[er].l = 1 * new Date();
+    var a = e.createElement(n),
+        m = e.getElementsByTagName(n)[0];
+    a.async = 1;
+    a.src = d;
+    m.parentNode.insertBefore(a, m)
+  })(window, document, 'script', 'https://cdn.sender.net/accounts_resources/universal.js', 'sender');
+  sender('d3766cb7935281')
+</script>
+
+<style>
+    body {
+        background-color: black;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+        height: 90vh;
+    }
+</style>