feat(server): allow customize mailer server (#5835)

packages/backend/server/src/fundamentals/config/def.ts

@@ -1,4 +1,5 @@
 import type { ApolloDriverConfig } from '@nestjs/apollo';
+import SMTPTransport from 'nodemailer/lib/smtp-transport';
 
 import type { LeafPaths } from '../utils/types';
 import { EnvConfigType } from './env';
@@ -264,18 +265,6 @@ export interface AFFiNEConfig {
         }
       >
     >;
-    /**
-     * whether to use local email service to send email
-     * local debug only
-     */
-    localEmail: boolean;
-    email: {
-      server: string;
-      port: number;
-      login: string;
-      sender: string;
-      password: string;
-    };
     captcha: {
       /**
        * whether to enable captcha
@@ -299,6 +288,13 @@ export interface AFFiNEConfig {
     };
   };
 
+  /**
+   * Configurations for mail service used to post auth or bussiness mails.
+   *
+   * @see https://nodemailer.com/smtp/
+   */
+  mailer?: SMTPTransport.Options;
+
   doc: {
     manager: {
       /**

packages/backend/server/src/fundamentals/config/default.ts

@@ -167,14 +167,6 @@ export const getDefaultAFFiNEConfig: () => AFFiNEConfig = () => {
         return this.privateKey;
       },
       oauthProviders: {},
-      localEmail: false,
-      email: {
-        server: 'smtp.gmail.com',
-        port: 465,
-        login: '',
-        sender: '',
-        password: '',
-      },
     },
     storage: getDefaultAFFiNEStorageConfig(),
     rateLimiter: {