Auto convert shortlinks to lower case

src/main/resources/public/index.html

@@ -31,6 +31,10 @@
             line-height: 25px;
             overflow: scroll;
         }
+
+        form input[name="shortUrl"] {
+            text-transform: lowercase;
+        }
     </style>
 </head>
 
@@ -47,7 +51,7 @@
                 <div class="pure-control-group">
                     <label for="shortUrl">Short URL (Optional)</label>
                     <input type="text" name="shortUrl" id="shortUrl" placeholder="Only a-z, 0-9, - and _ are allowed"
-                        pattern="[a-z0-9_-]+" />
+                        pattern="[A-Za-z0-9_-]+" />
                 </div>
                 <div class="pure-controls">
                     <button class="pure-button pure-button-primary">Submit</button>