Update to db.js

Bookings/src/db.js

@@ -1,7 +1,7 @@
 var mariadb = require('mariadb');
 require('dotenv').config();
 
-var pool = mariadb.createPool({
+const pool = mariadb.createPool({
     host: process.env.DB_HOST, 
     user: process.env.DB_USER, 
     password: process.env.DB_PASS,
@@ -9,7 +9,7 @@ var pool = mariadb.createPool({
     database: process.env.DB_NAME,
     multipleStatements: true,
     connectionLimit: 5
-            });
+});
 
 module.exports={
     getConnection: function(){