docs: minor updates

Author: Rel1cx

website/content/docs/getting-started/typescript-with-alternative-parser.mdx

@@ -39,6 +39,21 @@ export default tseslint.config({
 
 ## Setup with Fallback Parsers
 
+### Add `typescript-eslint` to the project dependencies
+
+```sh copy title="Terminal"
+# npm
+npm install --save-dev typescript-eslint
+
+# pnpm
+pnpm add --save-dev typescript-eslint
+
+# yarn
+yarn add --dev typescript-eslint
+```
+
+### Update the `eslint.config.js` file
+
 ```js title="eslint.config.js"
 
 // @ts-check