This project is what we use to generate item shop images like above. Offerings can be added to the array in ./src/offerings.ts using our items package @rlss/items to then display them on localhost:3000. From here, take a screenshot of a webpage set to 2048x1024 to ensure the content fits the page correctly, and share!
A web version of this is in progress where the items can be set on the page itself rather than through code, though it is a low priority so it isn't being actively developed. We also would like to eventually display it directly on the rlss.gg website.