feat(logo): add logo image to the navbar in index.html

Author: httpdss

site/images/logo.png

@@ -114,7 +114,7 @@
   <nav class="navbar">
     <div class="container navbar-content">
       <div class="navbar-brand">
-        STRUCT:
+        <img src="/images/logo.png" alt="STRUCT Logo" class="navbar-logo">
       </div>
       <ul class="navbar-nav">
         <li><a href="#features">Features</a></li>