feat(server): email notifications (#8447)

* feat(server): add `react-mail` as mail template engine and `nodemailer`

* feat(server): add `smtp` related configs to `SystemConfig`

* feat(web): add page for SMTP settings

* feat(server): add `react-email.adapter`

This adapter render the React-Email into HTML and plain/text email.
The output is set as the body of the email.

* feat(server): add `MailRepository` and `MailService`

Allow to use the NestJS-modules-mailer module to send SMTP emails.
This is the base transport for the `NotificationRepository`

* feat(server): register the job dispatcher and Job for async email

This allows to queue email sending jobs for the `EmailService`.

* feat(server): add `NotificationRepository` and `NotificationService`

This act as a middleware to properly route the notification to the right transport.
As POC I've only implemented a simple SMTP transport.

* feat(server): add `welcome` email template

* feat(server): add the first notification on `createUser` in `UserService`

This trigger an event for the `NotificationRepository` that once processes
by using the global config and per-user config will carry the payload to the right notification transport.

* chore: clean up

* chore: clean up web

* fix: type errors"

* fix package lock

* fix mail sending, option to ignore certs

* chore: open api

* chore: clean up

* remove unused import

* feat: email feature flag

* chore: remove unused interface

* small styling

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>
Co-authored-by: Daniel Dietzler <mail@ddietzler.dev>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

server/src/services/microservices.service.ts

@@ -7,6 +7,7 @@ import { JobService } from 'src/services/job.service';
 import { LibraryService } from 'src/services/library.service';
 import { MediaService } from 'src/services/media.service';
 import { MetadataService } from 'src/services/metadata.service';
+import { NotificationService } from 'src/services/notification.service';
 import { PersonService } from 'src/services/person.service';
 import { SessionService } from 'src/services/session.service';
 import { SmartInfoService } from 'src/services/smart-info.service';
@@ -22,23 +23,25 @@ export class MicroservicesService {
     private auditService: AuditService,
     private assetService: AssetService,
     private configService: SystemConfigService,
+    private databaseService: DatabaseService,
     private jobService: JobService,
     private libraryService: LibraryService,
     private mediaService: MediaService,
     private metadataService: MetadataService,
+    private notificationService: NotificationService,
     private personService: PersonService,
     private smartInfoService: SmartInfoService,
     private sessionService: SessionService,
     private storageTemplateService: StorageTemplateService,
     private storageService: StorageService,
     private userService: UserService,
-    private databaseService: DatabaseService,
   ) {}
 
   async init() {
     await this.databaseService.init();
     await this.configService.init();
     await this.libraryService.init();
+    await this.notificationService.init();
     await this.jobService.init({
       [JobName.ASSET_DELETION]: (data) => this.assetService.handleAssetDeletion(data),
       [JobName.ASSET_DELETION_CHECK]: () => this.assetService.handleAssetDeletionCheck(),
@@ -80,6 +83,8 @@ export class MicroservicesService {
       [JobName.LIBRARY_REMOVE_OFFLINE]: (data) => this.libraryService.handleOfflineRemoval(data),
       [JobName.LIBRARY_QUEUE_SCAN_ALL]: (data) => this.libraryService.handleQueueAllScan(data),
       [JobName.LIBRARY_QUEUE_CLEANUP]: () => this.libraryService.handleQueueCleanup(),
+      [JobName.SEND_EMAIL]: (data) => this.notificationService.handleSendEmail(data),
+      [JobName.NOTIFY_SIGNUP]: (data) => this.notificationService.handleUserSignup(data),
     });
 
     await this.metadataService.init();