Remove Node_modules as not needed vendored

also changed few Things about Website

website/_site/screenshots/index.html

@@ -17,7 +17,7 @@
   <meta name="twitter:title" content="KST4Contest Screenshots">
   <meta name="twitter:description" content="Screenshots of KST4Contest, the contest-optimized ON4KST chat client for VHF, UHF and SHF operators.">
 
-  <link rel="stylesheet" href="/assets/css/main.css?v=1783381592602">
+  <link rel="stylesheet" href="/assets/css/main.css?v=1783425387839">
   <link rel="alternate" type="application/rss+xml" title="KST4Contest News" href="/feed.xml">
 
 <meta property="og:image" content="https://kst4contest.hamradioonline.de/assets/social/kst4contest-og.png">
@@ -57,7 +57,7 @@
       
         <a href="/faq/">FAQ</a>
       
-      <a class="nav-cta" href="https://github.com/praktimarc/kst4contest/releases/latest">Download</a>
+      <a class="nav-cta" href="/download/">Download</a>
     </nav>
   </header>