message: fix: respect protcol in hostnames
  Closes
diff: @@ -44,6 +44,9 @@ export class GitHubManager {
  if (hostname === 'github.com') {
  return 'https://api.github.com';
  }
  + if (hostname.startsWith('http')) {
  + return `${hostname}/api/v3`;
  + }
  return `https://${hostname}/api/v3`;
  }
  