Checkout donations

                                      
              fastify.post("/create-checkout-session", async (request, reply) => {
  
                // fail silently if the amount is less than $0.50, as that's 
                // the minimum Stripe can charge
                if (Number.isNaN(request.body.amount) || request.body.amount < 0.5) {
                  return reply.send({
                    error: 'Invalid amount sent',
                  });
                }

                const session = await stripe.checkout.sessions.create({
                  payment_method_types: ['card'],
                  line_items: [
                    {
                      price_data: {
                        currency: 'usd',
                        product_data: {
                          name: 'Tiny Demos donation',
                          images: ['https://i.imgur.com/EHyR2nP.png'],
                        },
                        unit_amount: request.body.amount * 100,
                      },
                      quantity: 1,
                    },
                  ],
                  mode: 'payment',
                  success_url: `${process.env.BASE_URI}?success=true`,
                  cancel_url: `${process.env.BASE_URI}/?cancel=true`,
                });

                reply.redirect(session.url);
              });