Modify the App.js file when mapping the data so that it corresponds to the database collumn name

{item.<yourCollumnName>}

The query in api.js must correspond to the database table name

client.query("SELECT * FROM <yourTableName>", function(err, result) {})

$node api.js

API local endpoint: http://localhost:8080/api.json

$npm start

App starts on: http://localhost:3000/