I no longer recommend using another server adapter, like Express, for the new version of Shopify Hydrogen. Instead, I suggest using only Oxygen for now. Keep in mind that Oxygen operates on Cloudflare Workers, which limits the Node APIs you can use. I recommend checking out the following database option recommended by Cloudflare: Connect to databases | Cloudflare Workers docs.
Here come the dumb questions. I’m not super familiar with cloudflare - one of the great things about hydrogen/oxygen is how easily you can get things spun up without needing to know too much.
Will I be creating a cloudflare worker? I would think hydrogen is the cloudflare worker in this case. In which case I’m not sure how I need to configure wrangler.toml.