added beginnings of stripe payment for subscriptions

ui/static/checkout.js

@@ -0,0 +1,21 @@
+const stripe = Stripe("pk_test_51QikGlGk6yuk3uA8MT3uQrPMpUqJlKzkxfbrfrd34yXolWSbJYEFWm674s2aUydZyjjS0W2oByEJTV0LXMs1pWTk002ioHxQl6");
+
+initialize();
+
+// Create a Checkout Session
+async function initialize() {
+  const fetchClientSecret = async () => {
+    const response = await fetch("/create-checkout-session", {
+      method: "POST",
+    });
+    const { clientSecret } = await response.json();
+    return clientSecret;
+  };
+
+  const checkout = await stripe.initEmbeddedCheckout({
+    fetchClientSecret,
+  });
+
+  // Mount Checkout
+  checkout.mount('#checkout');
+}