Update migration 11-12 guide

website/docs/migrations/11-12.md

@@ -69,7 +69,7 @@ The `Manifest` class has been removed. If you are using this class in your proje
 
 **Migration time: ~5min.**
 
-1. Run the `wp boilerplate manifest-cache` CLI command to add the cache functionality to your project.
+1. Run the `wp boilerplate create manifest-cache` CLI command to add the cache functionality to your project.
 
 2. Open the `functions.php` (or `<plugin-name>.php`) file and add the following code before the `Main` class initialization:
    - [for themes](https://github.com/infinum/eightshift-libs/blob/main/src/Init/theme/functions.php)
@@ -218,3 +218,28 @@ const projectConfig = {
 	},
 };
 ```
+
+### Update ES Lint config
+
+**Migration time: ~10min.**
+
+Depending on the state the project is in, you might need to allocate some time for fixing errors and warnings after updating the coding standards.
+
+ESLint configuration has been updated in Frontend libs 12 and a new build config was added.
+
+To implement the changes, follow these steps:
+
+1. Delete the `.eslintrc.js`  and `.eslintignore` files from the theme root (if they exist)
+
+2. Add `eslint.config.mjs` file to the theme root with the following content:
+```js
+import config from '@eightshift/frontend-libs/linters/eslint.config.mjs';
+
+export default [{
+    ignores: ["public/**/*.js"],
+}, ...config];
+```
+
+3. Add a `.swcrc` file to theme root, the file and its content can be found in the eightshift libs standard theme setup [.swcrc](https://github.com/infinum/eightshift-libs/blob/main/src/InitSetup/standard/theme/.swcrc) file.
+
+4. Make sure the project is using NodeJS version 20 (or newer) both in development and production environments.