add server to monorepo.

packages/server/src/services/Subscription/MailMessages.ts

@@ -0,0 +1,30 @@
+import { Service } from "typedi";
+
+@Service()
+export default class SubscriptionMailMessages {
+  /**
+   * 
+   * @param phoneNumber 
+   * @param remainingDays 
+   */
+  public async sendRemainingSubscriptionPeriod(phoneNumber: string, remainingDays: number) {
+    const message: string = `
+      Your remaining subscription is ${remainingDays} days,
+      please renew your subscription before expire.
+    `;
+    this.smsClient.sendMessage(phoneNumber, message);
+  }
+
+  /**
+   * 
+   * @param phoneNumber 
+   * @param remainingDays 
+   */
+  public async sendRemainingTrialPeriod(phoneNumber: string, remainingDays: number) {
+    const message: string = `
+      Your remaining free trial is ${remainingDays} days,
+      please subscription before ends, if you have any quation to contact us.`;
+
+    this.smsClient.sendMessage(phoneNumber, message);
+  }
+}