custom_rest.php

<?php

add_action('rest_api_init', 'getawayRegisterRoute');

function getawayRegisterRoute() {
  register_rest_route( 'getaway/v1', 'data', array(
    'methods' => WP_REST_SERVER::READABLE,
    'callback' => 'getawayDataResults'
  ));
}

function getawayDataResults() {
  $getaways = new WP_Query(array(
    'post_type' => 'lodging-getaways',
    'posts_per_page' => 10
  ));

  $getawayResults = array();

  while($getaways->have_posts()) {
    $getaways->the_post();
    array_push($getawayResults, array(
      'title' => get_the_title(),
      'permalink' => get_the_permalink(),
      'imageLink' => get_the_post_thumbnail_url( get_the_ID(), 'large' )
    ));
  }

  return $getawayResults;
}