Add autofocus attribute to password login field (#496)

changedetectionio/templates/login.html

@@ -9,7 +9,7 @@
             <div class="pure-control-group">
                 <label for="password">Password</label>
                 <input type="password" id="password" required="" name="password" value=""
-                       size="15"/>
+                       size="15" autofocus />
                 <input type="hidden" id="email" name="email" value="defaultuser@changedetection.io" />
             </div>
             <div class="pure-control-group">