clarify env vars that control handling

Author: petebacondarwin

src/content/partials/workers/secrets-in-dev.mdx

@@ -34,10 +34,10 @@ When you select a Cloudflare environment in your local development, the correspo
   - `.env.<environment-name>`
   - `.env` (least specific)
 
-:::note
-To disable loading local dev vars from `.env` files without providing a `.dev.vars` file, set the `CLOUDFLARE_LOAD_DEV_VARS_FROM_DOT_ENV` environment variable to `"false"`.
-:::
+:::note[Controlling `.env` handling]
+It is possible to control how `.env` files are loaded in local development by setting environment variables on the process running the tools.
+
+- To disable loading local dev vars from `.env` files without providing a `.dev.vars` file, set the `CLOUDFLARE_LOAD_DEV_VARS_FROM_DOT_ENV` environment variable to `"false"`.
+- To include every environment variable defined in your system's process environment as a local development variable, ensure there is no `.dev.vars` and then set the `CLOUDFLARE_INCLUDE_PROCESS_ENV` environment variable to `"true"`.
 
-:::note
-To include every environment variable defined in your system's process environment as a local development variable, ensure there is no `.dev.vars` and then set the `CLOUDFLARE_INCLUDE_PROCESS_ENV` environment variable to `"true"`.
 :::