[website] Add function to save on WebAPIs

[inaki321]

No description provided.

[Erugand]

Maybe we want to change the example to show that the recommended practice is to have a non-functional / endpoint like

@app.get("/")
def base():
return {"ok": True}

@app.get("/roll")
async def roll():
return f"You rolled a {random.randint(1, 6)}!"

Also, now that I read the section at the bottom deploying with --type flask it's less clear to me why I deploy with --type uvicorn, and yesterday you said we could also do --type fastapi and here --flask for a fastapi API