feat: complete saleor core extensions app with React email templates

- Order confirmation, shipped, and cancelled email templates
- Uses @react-email/components for professional HTML emails
- Sends admin and customer notifications
- Integrates with Resend for email delivery
- Webhook handlers for ORDER_CREATED, ORDER_FULFILLED, ORDER_CANCELLED
- Docker image optimized for production
- Persistent auth data storage via PVC

src/pages/api/register.ts

@@ -0,0 +1,21 @@
+// Patch fetch to force HTTPS for api.manoonoils.com
+const originalFetch = global.fetch;
+global.fetch = async (input: RequestInfo | URL, init?: RequestInit) => {
+  let url = input.toString();
+  if (url.startsWith('http://api.manoonoils.com/')) {
+    url = url.replace('http://', 'https://');
+    input = url;
+  }
+  return originalFetch(input, init);
+};
+
+import { createAppRegisterHandler } from "@saleor/app-sdk/handlers/next";
+import { saleorApp } from "@/saleor-app";
+
+export default createAppRegisterHandler({
+  apl: saleorApp.apl,
+  allowedSaleorUrls: [
+    "https://api.manoonoils.com/graphql/",
+    "http://api.manoonoils.com/graphql/",
+  ],
+});