I do have to question your usage of stripe, not because I think stripe is bad, but because I know of numerous creators who have been banned from it. Might I suggest looking into possible direct deposit options?
We use Python/Flask for backend. Postgresql, Redis and Docker Compose. We use Amazon S3 for hosting images, but we have made it easy to switch in case there will be problems (as seen by Parler). Frontend we use a mix between Vuejs and Jinja2.
And for hosting we run both on our own servers and on Netlify, but Netlify can easily be switched out as well in case of troubles.