[enh] add cc for mail

src/lib/mail.ts

@@ -23,6 +23,7 @@ export async function sendMail(conf: ConfMail, subject: string, html: string) {
     let info = await transporter.sendMail({
       from: conf.from,
       to: conf.to,
+      cc: conf.cc,
       subject,
       html
     })