docs: update expiration recipe to match new schema

[DOCS-1196]: https://hasurahq.atlassian.net/browse/DOCS-1196?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

PR-URL: https://github.com/hasura/graphql-engine-mono/pull/10160
GitOrigin-RevId: bec5c163167141414b170430c4867141749a88fe

docs/docs/scheduled-triggers/recipes/check-expiration.mdx

@@ -15,6 +15,7 @@ keywords:
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 import Thumbnail from '@site/src/components/Thumbnail';
+import SampleAppBlock from '@site/src/components/SampleAppBlock';
 
 # Send a Coupon Expiration Reminder Email
 
@@ -25,15 +26,21 @@ guide, we'll walk through how to use Scheduled Triggers on an e-commerce type ap
 users when their coupon is about to expire. Nudges like this can help increase conversion rates and improve the overall
 user experience.
 
+<SampleAppBlock dependent />
+
 ## Prerequisites
 
 Before getting started, ensure that you have the following in place:
 
-- A Hasura project, either locally or using [Hasura Cloud](https://cloud.hasura.io/?skip_onboarding=true).
+- The docs e-commerce sample app deployed to Hasura Cloud.
 - A working SMTP server or email-sending service that you can integrate with to send emails.
-- If you plan on using a webhook endpoint hosted on your own machine with a Hasura project hosted elsewhere, ensure that
-  you have a tunneling service such as [ngrok](https://ngrok.com/) set up so that a remotely hosted instance can
-  communicate with your local machine.
+
+:::info Tunneling your webhook endpoint from your local machine
+
+If you plan on using a webhook endpoint hosted on your own machine, ensure that you have a tunneling service such as
+[ngrok](https://ngrok.com/) set up so that your Cloud Project can communicate with your local machine.
+
+:::
 
 ## Our model
 
@@ -45,50 +52,8 @@ When sending transactional emails such as this, there are three fundamental comp
   email? How will you return information so that you have the correct data to include in the email?
 - **Your email templating**: How will you generate and send the email containing the information you want to send?
 
-For simplicity, we're assuming two tables in our database: `users` and `coupons`. The `users` table contains the details
-of our users, and the `coupons` table contains the details of the coupons that we want to send reminders for.
-
-<details>
-<summary>
-Click here for the SQL to generate these tables and some seed data.
-</summary>
-
-```sql
--- Create the 'users' table
-CREATE TABLE public.users (
-    id SERIAL PRIMARY KEY,
-    name VARCHAR(255),
-    email TEXT NOT NULL
-);
-
--- Create the 'coupons' table
-CREATE TABLE public.coupons (
-    id SERIAL PRIMARY KEY,
-    user_id INTEGER REFERENCES public.users(id),
-    code VARCHAR(255),
-    expiration_date DATE
-);
-
--- Seed data for the 'users' table
-INSERT INTO public.users (name, email) VALUES
-    ('Daniel Ricciardo', 'user1@example.com'),
-    ('Charles Leclerc', 'user2@example.com'),
-    ('Carlos Sainz', 'user3@example.com');
-
--- Seed data for the 'coupons' table
-INSERT INTO public.coupons (user_id, code, expiration_date) VALUES
-    (1, 'COUPON3', NOW() + INTERVAL '2 day'),
-    (2, 'COUPON16', NOW() + INTERVAL '2 day'),
-    (3, 'COUPON55', NOW() + INTERVAL '2 day');
-```
-
-You can copy / paste this into the `RUN SQL` tab in the Hasura Console on the `Data` page. Then, track all relationships
-under the `Public` schema on the `Data` page.
-
-**We're generating coupons that expire in two days so that we can test our Scheduled Trigger. If you run this SQL and
-come back to the project later, remember to update the `expiration_date` field.**
-
-</details>
+Our sample app's database contains, among others, two tables: `users` and `coupons`. The `users` table contains the
+details of our users, and the `coupons` table contains the details of the coupons that we want to send reminders for.
 
 ## Step 1: Create the Scheduled Event
 
@@ -104,14 +69,14 @@ Head to your the Hasura Console of your project and navigate to the "Events" tab
 ## Step 2: Configure the Scheduled Event
 
 First, provide a name for your trigger, e.g., `send_coupon_expiration_email`. Then, enter a webhook URL that will be
-called when the event is triggered. This webhook will be responsible for sending the review request email and can be
-hosted anywhere, and written in any language, you like.
+called when the event is triggered. This webhook will be responsible for sending the email and can be hosted anywhere,
+and written in any language, you like.
 
 In the example below, if we're using Docker, we'll use a webhook endpoint hosted on our own machine running on port
 `4000`. Let's enter the following URL to allow Docker to communicate with the host machine:
 
 ```
-http://host.docker.internal:4000/expiration_check
+https://<your-webhook-url>/expiration_check
 ```
 
 :::info Tunneling your webhook endpoint
@@ -207,6 +172,12 @@ nodemailer.createTestAccount((err, account) => {
     },
   });
 
+  // helper function to turn timestamp into a date
+  function timestampToDate(timestamp) {
+    const date = new Date(timestamp);
+    return date;
+  }
+
   // Our route for the webhook
   app.post('/expiration_check', async (req, res) => {
     // confirm the auth header is correct — ideally, you'd keep the secret in an environment variable
@@ -220,19 +191,19 @@ nodemailer.createTestAccount((err, account) => {
     // get our date ready for the query
     const today = new Date();
     const twoDaysFromNow = today.setDate(today.getDate() + 2);
-    const twoDaysFromNowString = new Date(twoDaysFromNow).toISOString().split('T')[0];
+    const twoDaysFromNowTimestamp = new Date(twoDaysFromNow).toISOString();
 
     // Fetch the data from our Hasura instance
     async function getExpiringCoupons() {
-      const response = await fetch('http://localhost:8080/v1/graphql', {
+      const response = await fetch('<YOUR_CLOUD_PROJECT_ENDPOINT>', {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',
-          // "x-hasura-admin-secret": "<YOUR-ADMIN-KEY>",
+          'x-hasura-admin-secret': '<YOUR_ADMIN_SECRET>',
         },
         body: JSON.stringify({
           query: `
-          query GetExpiringCoupons($two_days_from_now: date!) {
+          query GetExpiringCoupons($two_days_from_now: timestamptz!) {
             coupons(where: {expiration_date: {_lte: $two_days_from_now}}) {
                 id
                 code
@@ -246,7 +217,7 @@ nodemailer.createTestAccount((err, account) => {
             }
           `,
           variables: {
-            two_days_from_now: twoDaysFromNowString,
+            two_days_from_now: twoDaysFromNowTimestamp,
           },
         }),
       });
@@ -267,7 +238,7 @@ nodemailer.createTestAccount((err, account) => {
           subject: `You've got a coupon expiring soon, ${coupon.user.name.split(' ')[0]}!`,
           text: `Yo ${coupon.user.name.split(' ')[0]},\n\nYour coupon code, ${
             coupon.code
-          }, is expiring soon! Use it before ${coupon.expiration_date}.\n\nThanks,\nSuperStore.com`,
+          }, is expiring soon! Use it before ${timestampToDate(coupon.expiration_date)}.\n\nThanks,\nSuperStore.com`,
         };
 
         // Send the message using the Nodemailer transporter