feat: make SMTP auth optional and add SMTP_SECURE config (#92)

* feat: add SMTP_SECURE option to email config

* feat: allow unauthenticated SMTP servers

packages/email/src/sendEmail.tsx

@@ -16,11 +16,14 @@ const emailTemplates: Record<Templates, React.FC> = {
 const transporter = nodemailer.createTransport({
   host: process.env.SMTP_HOST,
   port: Number(process.env.SMTP_PORT),
-  secure: true,
-  auth: {
-    user: process.env.SMTP_USER,
-    pass: process.env.SMTP_PASSWORD,
-  },
+  secure: process.env.SMTP_SECURE !== "false",
+  ...(process.env.SMTP_USER &&
+    process.env.SMTP_PASSWORD && {
+      auth: {
+        user: process.env.SMTP_USER,
+        pass: process.env.SMTP_PASSWORD,
+      },
+    }),
 });
 
 export const sendEmail = async (