Align table headers

dashboard/index.html

@@ -58,9 +58,9 @@
         <table class="table table-striped table-hover" v-if="hashtagRanking.length">
           <thead>
             <tr>
-              <th scope="col">Rank</th>
+              <th scope="col" class="text-center">Rank</th>
               <th scope="col">Hashtag</th>
-              <th scope="col">Counts</th>
+              <th scope="col" class="text-right">Counts</th>
             </tr>
           </thead>
           <tbody>