Add deploy.sh + .deploy.env.example; update index.html (sponsor checkout link)

index.html

@@ -386,7 +386,7 @@
   </div>
 
   <div class="cta-row">
-    <a class="cta" href="https://opencollective.com/inference-cooperative/donate?redirect=https://inference.coop/thanks/">Become a member</a>
+    <a class="cta" href="https://opencollective.com/inference-cooperative/contribute/sponsors-105477/checkout?interval=month&amount=15">Become a member</a>
     <a class="cta-secondary" href="https://my.inference.coop">Member login</a>
   </div>