Infra 3283 - Add contact us about membership link

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/content/en_sidebar.php b/content/en_sidebar.php
index 9c5c29e..7c74602 100644
--- a/content/en_sidebar.php
+++ b/content/en_sidebar.php
@@ -51,6 +51,19 @@
         </div>
       </div>
     <?php endif;?>
+    <?php if (isset($show_membership_contact) && $show_membership_contact == TRUE) :?>
+      <div class="padding-bottom-20 clearfix margin-bottom-15">
+        <div class="col-xs-8 col-md-9 hidden-xs hidden-sm">
+          <a class="circle-icon" href="https://accounts.eclipse.org/contact/membership">
+            <i class="fa fa-envelope-o orange"></i>
+          </a>
+        </div>
+        <div class="col-sm-24 col-md-15">
+          <h3><a href="/corporate_sponsors">Contact us about membership</a></h3>
+          <p>Contact us about your organization joining the Eclipse Foundation</p>
+        </div>
+      </div>
+    <?php endif;?>
     <?php if (!isset($hide_faqs) || $hide_faqs == FALSE) :?>
       <div class="padding-bottom-20 clearfix">
         <div class="col-xs-8 col-md-9 hidden-xs hidden-sm">
diff --git a/index.php b/index.php
index cefb732..f18745a 100644
--- a/index.php
+++ b/index.php
@@ -28,6 +28,7 @@
 $hide_tips = TRUE;
 $hide_faqs = TRUE;
 $show_corporate_sponsors_block = TRUE;
+$show_membership_contact = TRUE;
 
 ob_start();
 ?>