update design

Author: risenW

dnotebook/src/public/stylesheets/style.css

@@ -6,7 +6,7 @@ a {
   color: #00B7FF;
 }
 
-.container{
+.content{
   padding: 20px;
   margin-left: 10px; 
   margin-right: 10px;

dnotebook/src/views/about.hbs

@@ -83,7 +83,7 @@
         </div>
     </div>
     <hr>
-    <div class="row">
+    <div class="row" style="margin-bottom: 40px;">
         <div class="col-md-8">
             <h3> Creators and Core Maintainers</h3>
 

dnotebook/src/views/layout.hbs

@@ -140,6 +140,11 @@
   {{{body}}}
 
 
+  <nav class="navbar-dark bg-dark fixed-bottom">
+    <div class="col-md-12 text-center">
+      <p style="color: white;"> © 2020 Dnotebook</p>
+    </div>
+  </nav>
   <script src="javascripts/index.js"></script>
   <script src="javascripts/utils.js"></script>
 </body>