The application comes with a docker compose environment, simply drop the API in the api folder and execute docker-compose up -d.
The application is in the src folder, by default it makes the petition to http://localhost:8888/ but you can change it by setting an environment variable called API_LOCATION or by changig the value of the constant DEFAULT_LOCATION in src/index.php (line 7) with the route of the API location. Remember that the route of the API should always end with a slash.