Add the tracker index to the Transactions table

Author: joojis

src/migrations/20191112103807-add-transaction-index-tracker.js

@@ -0,0 +1,11 @@
+"use strict";
+
+module.exports = {
+    up: async (queryInterface, Sequelize) => {
+        await queryInterface.addIndex("Transactions", ["tracker"]);
+    },
+
+    down: async (queryInterface, Sequelize) => {
+        await queryInterface.removeIndex("Transactions", ["tracker"]);
+    }
+};