Add countdown timer

Author: devgupta2607

index.html

@@ -95,7 +95,7 @@
       <h1 class="display-4 typing-anim-ref"><b>Hello, world!</b></h1>
       <h4 class="a-landing-sub-text">Welcome to OpenCode'19</h4>
       <a href="#participants"><button class="header-btn mt-5 a-btn">Get Started</button></a>
-      
+
       <div class="countdownContainer display-4 a-landing-header-text">
             <div class="values">OpenCode Countdown</div>
             <div class="info" style="font-family: 'Orbitron'">