Add referral code page

navbar.html

@@ -4,6 +4,7 @@
     <a href="https://searx.bbaovanc.com/" rel="noreferrer" target="_blank">My Searx Instance</a>
     <a href="https://git.bbaovanc.com/bbaovanc" rel="noreferrer" target="_blank">My Git Repositories</a>
     <a href="/donate/">Donate</a>
+    <a href="/referrals/">Referral Codes</a>
     <a href="/contact/">Contact Me</a>
     <a href="/gpg-fingerprints/">GPG Fingerprints</a>
     <a href="/fun/">Fun</a>