To create a Shopify app using Strapi, you will need to follow these steps:

Install Strapi by running the following command:

npm install strapi@alpha -g

Create a new Strapi project by running the following command:

strapi new my-project

Navigate to the project directory and start the Strapi server:

cd my-project
strapi start

• In your web browser, open the Strapi admin panel by going to http://localhost:1337/admin.
• From the admin panel, create a new collection type for your app. A collection type is like a database table that you can use to store and retrieve data.
• Use the Strapi API to create, read, update, and delete (CRUD) data in your collection type. You can do this by making HTTP requests to the Strapi API endpoints.
• Use the Shopify API to create a private app in your Shopify store. This will give you access to the API keys and passwords that you need to authenticate your app with Shopify.
• Use the Shopify API to build the functionality of your app. You can do this by making HTTP requests to the Shopify API endpoints.

To create a private app in your Shopify store, you will need to do the following:

1. Log in to your Shopify account and go to the app section of your store’s dashboard.
2. Click on the “Private apps” tab.
3. Click on the “Create a new private app” button.
4. Enter a name and contact email for your app.
5. Select the permissions that you want your app to have.
6. Click on the “Create app” button.

This will create a private app in your store and give you access to the API keys and passwords that you need to authenticate your app with Shopify.

Once you have created a private app, you can use the Shopify API to build the functionality of your app. The Shopify API is a set of HTTP-based interfaces that allow you to programmatically access and modify data in a Shopify store. You can use the API to perform a wide range of tasks, such as creating and managing products, processing orders, and tracking inventory.

Install the axios library in your Strapi app. You will use this library to make HTTP requests to the Shopify API.

npm install axios

Require the axios library in your Strapi app.

const axios = require('axios');

Set up the authentication headers for your HTTP requests. You will need to use the API key and password for your private app to authenticate your requests.

const headers = {
  'X-Shopify-Access-Token': 'YOUR_API_PASSWORD',
  'Content-Type': 'application/json'
};

Make an HTTP request to the appropriate Shopify API endpoint. For example, to get a list of products in your store, you could use the following code:

axios.get('https://YOUR_STORE_NAME.myshopify.com/admin/products.json', { headers })
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.log(error);
  });

Use the data returned from the API to perform the desired action in your Strapi app.