Add Stellar Wallet to Your Browser

I did my best, as a NextJS rookie, to help my Stellar HEX Demo user to add the non-custodial Stellar wallet - Freighter - to her browser right from the demo. And it seemed to be working fine locally with npm run dev. Not so for you, I'm afraid. So please, before you ever consider running my demo, add Freighter to your browser, set it up and add an account.