Add Mailchimp submit form (#1204)

* Altered Mailchimp code

* bh rit -> BrickHack Interest audience

Author: peterkos

index.html

@@ -49,10 +49,23 @@
             <div class="window-body">
                 <p>BrickHack 8 is returning in early 2022!</p>
                 <div class="field-row-stacked">
-                    <label for="prereg-email">Enter your e-mail to stay updated.</label>
-                    <div class="field-row">
-                        <input id="prereg-email" type="text" placeholder="[email protected]">
-                        <button>Submit</button>
+                    <div id="mc_embed_signup">
+                        <form action="https://coderit.us11.list-manage.com/subscribe/post?u=122b09a8cef4c1f3888af8e40&amp;id=4c1af7f783" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate>
+                            <div id="mc_embed_signup_scroll">
+                                <div class="mc-field-group">
+                                    <label for="mce-EMAIL">Enter your e-mail to stay updated.</label>
+                                    <div class="field-row">
+                                        <input type="email" value="" name="EMAIL" class="required email" id="mce-EMAIL" placeholder="[email protected]">
+                                        <button type="submit">Submit</button>
+                                    </div>
+                                </div>
+                                <div id="mce-responses" class="clear">
+                                    <div class="response" id="mce-error-response" style="display:none"></div>
+                                    <div class="response" id="mce-success-response" style="display:none"></div>
+                                </div>    <!-- real people should not fill this in and expect good things - do not remove this or risk form bot signups-->
+                                <div style="position: absolute; left: -5000px;" aria-hidden="true"><input type="text" name="b_122b09a8cef4c1f3888af8e40_4c1af7f783" tabindex="-1" value=""></div>
+                            </div>
+                        </form>
                     </div>
                 </div>
             </div>