feat: SMTP integration and email notifications (#631)

docker-compose.yml

@@ -31,6 +31,14 @@ services:
       # - DEFAULT_ADMIN_NAME=Demo Demo
       # - DEFAULT_ADMIN_USERNAME=demo
 
+      # Email Notifications (https://nodemailer.com/smtp/)
+      # - SMTP_HOST=
+      # - SMTP_PORT=587
+      # - SMTP_SECURE=true
+      # - SMTP_USER=
+      # - SMTP_PASSWORD=
+      # - SMTP_FROM="Demo Demo" <demo@demo.demo>
+
       # - OIDC_ISSUER=
       # - OIDC_CLIENT_ID=
       # - OIDC_CLIENT_SECRET=