As a user of both, I tend to prefer the playground for most productive uses. I think chatgpt is a very specific use-case of language models that's mostly just for fun, and Google searches- but even for that the playground gives you greater control.
Would you consider checking out my site aidev.codes? You can use text-davinci-003 or code-davinci-002 and it will immediately create and host pages on the site. Or you can just collect whatever files and there is a download button. I plan to add GitHub and a lot of other stuff.
I am not sure what is the framework you are using for your site but it is not very mobile friendly. There are many frameworks available that can make a responsive site without much effort and also set up SSO authentication for you (like one can use google to login). I will try it later from a laptop.Good luck!