updating landing page and adding mastodon (#15)

Author: MasonEgger

docs/index.md

@@ -15,7 +15,7 @@ Join us for the largest gathering of Python developers within the great state of
 
     ---
 
-    PyTexas wouldn't be possible without our sponsors. Check back soon, or sign up for our mailing list to be notified when the prospectus opens. <!--Check out our [Prospectus](https://drive.google.com/file/d/1q1txXEPwDC79wNBa8x7SkQsbnjviCfAj/view) and sponsor PyTexas today.-->
+    PyTexas wouldn't be possible without our sponsors.  Check out our [Prospectus](sponsors/sponsor-us.md) and sponsor PyTexas today.
 
 -   :fontawesome-solid-ticket:{ .lg .middle} __Attend__
 
@@ -50,14 +50,7 @@ Join us for the largest gathering of Python developers within the great state of
     ---
 
     Get the latest news about the PyTexas Conference and all PyTexas Foundation activities.
-    <form role="form" action="//pytexas.us11.list-manage.com/subscribe/post?u=93d4ab771d0c2e4facc053add&amp;id=fa6aa40a2e" method="post" data-form-email novalidate>
-    <div class="form-row">
-        <input type="email" class="form-control" placeholder="Email Address" aria-label="Email Address" name="EMAIL" required style="border: 1px solid black; width: 200px; height: 45px;">
-        <button type="submit" class="md-button email-button--primary " data-loading-text="Sending">Subscribe</button>
-    </div>
-</form>
-<small class="text-muted form-text">
-    We'll never share your details. Refer to our <a href="privacy">Privacy Statement</a>.
-</small>
-
-</div>
+    [:octicons-arrow-right-24: Sign Up for Our Monthly Newsletter](https://mailchi.mp/035388afb48a/pytexas-community)
+
+
+</div>

mkdocs.yml

@@ -70,6 +70,9 @@ extra:
     - icon: fontawesome/brands/twitter
       link: https://twitter.com/pytexas
       name: Twitter
+    - icon: fontawesome/brands/mastodon
+      link: https://fosstodon.org/@pytexas
+      name: Mastodon
     - icon: fontawesome/brands/discord
       link: https://discord.gg/jNPAbcNukj
       name: Discord