in src/pr-comment.ts [17:26]
function getPreviewUrl(config: PullRequestCommentConfig): URL {
const url = new URL('https://riffraff.gutools.co.uk/preview/yaml');
url.searchParams.set('project', config.projectName);
url.searchParams.set('build', config.buildNumber);
url.searchParams.set('stage', config.commentingStage);
url.searchParams.set('updateStrategy', 'MostlyHarmless');
return url;
}