Add table headers

js/train-detail.js

@@ -43,6 +43,11 @@ async function displayOne(object) {
     <p id='data_headcode'>${object['headcode']}</p>
     <p id='data_piscode'>PIS Code: ${object['pis']}</p>
     <table id='data_table'>
+    <tr>
+      <th>Location<th>
+      <th>Arr.</th>
+      <th>Dep.</th>
+    </tr>
     `
   const dataTableClose = `
     </table>`