doc(cloudflare) add an HowTo for Stripe (#72)

Author: vicb

pages/cloudflare/howtos/_meta.json

@@ -0,0 +1,4 @@
+{
+  "NextAuth": "NextAuth",
+  "stripeAPI": "Stripe API"
+}

pages/cloudflare/howtos/stripeAPI.mdx

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+
+## [Stripe API](https://www.npmjs.com/package/stripe)
+
+When [creating a Stripe object](https://docs.stripe.com/js/initializing), the default http client implementation is based on `node:https` which is not implemented on Workers.
+
+However you can use an http client based on fetch ([`FetchHttpClient`](https://github.com/stripe/stripe-node/blob/54d423e5d1118dc35c4b76260889826003e00e9f/src/net/FetchHttpClient.ts)) via the `httpClient` option:
+
+```ts
+import Stripe from "stripe";
+
+const stripe = Stripe(STRIPE_API_KEY, {
+  // Cloudflare Workers use the Fetch API for their API requests.
+  httpClient: Stripe.createFetchHttpClient()
+});
+```
+