add : dmail module

src/configs/dmail.config.ts

@@ -0,0 +1,20 @@
+import { ConfigService } from "@nestjs/config";
+
+export function dmailConfig() {
+  return {
+    inject: [ConfigService],
+    useFactory: async (configService: ConfigService) => {
+      return {
+        baseUrl: configService.get<string>("DMAIL_BACKEND_URL")??'https://dmail-api.danakcorp.com',
+        username: configService.get<string>("DMAIL_USERNAME")??'danak@dsc.com',
+        password: configService.get<string>("DMAIL_PASSWORD")??'DsCdAnAk?@ABC',
+      };
+    },
+  };
+}
+
+export interface IDMailConfig {
+  baseUrl: string;
+  username: string;
+  password: string;
+}