chore(docs): Add note about private packages

docs/src/content/docs/reference/commands.md

@@ -11,7 +11,7 @@ Run this command inside your destination folder. You'll be asked questions about
 
 ## `secco`
 
-`secco` will scan your destination's `package.json` file and compare it with the available packages inside your source. It'll then copy over all changes into your destination's `node_modules` folder. Additionally, a watch task is started to continue copying over changes.
+`secco` will scan your destination's `package.json` file and compare it with the available packages inside your source. It'll then copy over all changes into your destination's `node_modules` folder. Additionally, a watch task is started to continue copying over changes. Packages that have [`"private": true`](https://docs.npmjs.com/cli/v10/configuring-npm/package-json#private) set will be ignored.
 
 Typically you'll want to also start a `watch` script inside your source to continuously compile your package artifacts.