Add banner to page (#16908)

docs/src/pages/index.js

@@ -106,6 +106,21 @@ function Home() {
           <section className={styles.features}>
             <div className="container">
               <div className="row cards__container">
+              <div class="alert alert--primary" role="alert">
+                <b>Announcing the Solana Season Hackathon</b>
+                <br />
+                Jumpstart your next project on Solana & join the fastest growing ecosystem in crypto
+                <br />
+                <a
+                  href="https://solana.com/solanaszn"
+                  rel="noopener noreferrer"
+                  target="_blank"
+                >
+                  <button class="button button--outline button--secondary">
+                    Register Now
+                  </button>
+                </a>
+              </div>
                 {features.map((props, idx) => (
                   <Feature key={idx} {...props} />
                 ))}