Add showcase form

Author: anniezhengg

src/templates/pages/index.hbs

@@ -17,7 +17,7 @@ slug: /
       <h1>{{#i18n "p1xh1"}}{{/i18n}}</h1>
       <p style="margin-top:1em">{{#i18n "p1x1"}}{{/i18n}}</p>
       <p>{{#i18n "p1x2"}}{{/i18n}}</p>
-      <p><a href="https://discord.gg/SHQ8dH25r9">Join the p5.js Discord!</a></p>
+      <p><a href="https://bit.ly/p5showcase2022">Submit to the p5.js 2022 Showcase!</a></p>
       <a href="https://editor.p5js.org"><span class='button_box'>{{#i18n "start-creating"}}{{/i18n}}</span></a>
 
       <h2>{{#i18n "p2xh2"}}{{/i18n}}</h2>