I like graphql in the backend and having it generate a schema file, and getting typescript typings from that, so all the data structures align nicely.
Add pushing to heroku / some cloud service via fabric, that'd easily put me at 1 week.
It's after the first week stuff really comes together. Then there's a reliable hot reload loop, scripts, familiar stuff you're used to is prepped.
I don't like the 1 week thing because I think you'd be stuck inside a framework/starter kit that'd hold down what you want to build. I think a month is minimum if you wanted to impress and get your idea across.