Here's where it gets real. Remember, you connected Vercel to GitHub earlier — so Vercel can already see your code. Now you just tell it which repo to publish.
Go to vercel.com/new. (If Vercel asks you to connect GitHub, click Continue with GitHub first.)
Find the repository you just created (likely named "spa" if you followed along) and click Import.

Click Deploy. You don't need to change any settings — Vercel figures it all out automatically.

Now wait about 30 seconds. Vercel is turning your code into a real website right now.

When you see "Congratulations" — your site is live. Let's go see it.