added readme info

README.md

@@ -96,6 +96,25 @@ Then edit `.env.local` and set:
 NEXT_PUBLIC_WEB3FORMS_ACCESS_KEY=your_web3forms_access_key
 ```
 
+## Web3Forms Destination Email
+
+The contact form does **not** send to an email address hardcoded in this repo.
+With Web3Forms, submissions are delivered to the inbox associated with the
+`access_key`.
+
+That means:
+
+- To change the **destination inbox** for form submissions, update the
+  Web3Forms access key in `.env.local` to one created for the email address
+  you want to receive messages at.
+- If you want the website to **display a different contact email address**,
+  edit `site.contact.email` and `site.footer.email` in `content.ts`.
+
+Web3Forms docs for this behaviour:
+
+- [FAQ](https://docs.web3forms.com/getting-started/faq)
+- [API reference](https://docs.web3forms.com/getting-started/api-reference)
+
 Install the website dependencies and build the static site:
 
 ```bash