After developing the basic functionality, dealing with some CSS for the landing page, and moving around the infrastructure, from Free Tier GCP to $10 Digital Ocean, finally, my very first MVP is ready. Some UX on the landing page still missing, but at least the main functionality is working as expected.
I spent more time on the infrastructure and BackEnd stuff since I built this by utilizing the serverless framework OpenFaas. I think it will be beneficial for me and the service itself.
Because in the future, the traffic more likely comes from the CLI tools that run on user CI/CD Pipeline, and so serverless deployment might more suitable.