message: fix(server): fixes invite link in emails
  `invite=xxx` -> `inviteId=xxx`
diff: @@ -37,7 +37,7 @@ module.exports = {
  await Invites().insert( invite )
  let serverInfo = await getServerInfo()
  - let inviteLink = new URL( `/authn/register?invite=${invite.id}`, process.env.CANONICAL_URL )
  + let inviteLink = new URL( `/authn/register?inviteId=${invite.id}`, process.env.CANONICAL_URL )
  let emailText, emailHtml, subject
  