Run 'npm install' inside the root directory to download the project's dependencies.
Use 'node index.js' to run the project on localhost, you can check localhost:8080/mdr directly from your browser but you'll have to use a tool like Postman to use /transaction.
Trying to post a transaction without using the following format will return an error. { "Valor" : double, "Adquirente" : string, "Bandeira" : string, "Tipo" : string }