Stripe Subscription Payment Integration with Grails

Develop an app with the Grails Framework 5.3.0 which consits of the subscription workflow with the payment integration provider Stripe.

- The deliverable will be a standalone Grails App (Version 5.3.0) https://grails.org/ consisting of a subscription payment integration with Stripe.

- The delivery format will be from a git repository of the developer from which the client can clone the project locally.

- The user of the Grails app will be able to choose a paid plan from 2 plans available (Basic & Premium).

- The payment frequency can be monthly (9,99 € for Basic, 39,99€ for Premium) or yearly (99,99 € for Basic, 299,99 € for Premium)

- The presentation of the plans shall be similar to https://www.webfx.com/blog/web-design/pricing-tables-examples/

- However, no special design is required. The standard Grails layout can be used. The text for the products can be dummy text.

- The user starts with a free plan (no subscription) and can choose a paid plan.

- Once the user is on a payed plan, he can upgrade his plan or he can switch back to the free plan.