Number field

I want to modified the job form. And I want to use input tag type number. I understand I can do this by adding a number-field.php in the wp-job-manager folder: templates/form-fields.

But can I do it from the child theme and how?

I have created childtheme/templates/form-fields and put the file in there, but no luck.

I’m using this code on functions.php of the child theme to add my custom field.

add_filter( 'submit_job_form_fields', 'frontend_harga' );

function frontend_harga( $fields ) {
  $fields['job']['job_harga'] = array(
    'label'       => __( 'Harga (Rp)', 'job_manager' ),
    'type'        => 'number',
    'required'    => true,
    'placeholder' => 'Misal: 20000',
    'priority'    => 1
  );
  return $fields;
}

https://wordpress.org/plugins/wp-job-manager/