Fix main.html image size

Author: hw0603

webserver/templates/main.html

@@ -10,7 +10,7 @@ <h2 class="text-center">Captcha Solver</h2>
             <div class="or-seperator"></div>
             <br>
             <div class="center-block">
-                <img src="{{ img_data }}" class="center-block" width="225" height="60" />
+                <img src="{{ img_data }}" class="center-block" width="280" height="70" />
             </div>
             <div class="or-seperator"></div>
             <h1 class="text-center bg-success">{{ captcha }}</h1>