Add installation instruction

README.md

@@ -4,10 +4,21 @@
 
 This library provides functions to interact with a Strapi v4 API and some more utilities.
 
+## Installation
+
+```bash
+npm install @schnaq/strapi4-utils
+# or
+yarn add @schnaq/strapi4-utils
+# or
+pnpm install @schnaq/strapi4-utils
+# ...
+```
+
 ## Configuration
 
 > [!NOTE]
-> You need to configure environment variables if you want to interact with the Strapi API
+> You need to configure environment variables if you want to interact with the Strapi API.
 
 - `STRAPI_API_URL`: The URL of the Strapi API. Also looks up the public variable `NEXT_PUBLIC_STRAPI_API_URL` if you are using nextjs and are using a client component.
 - `STRAPI_API_TOKEN`: The API token to authenticate with the Strapi API. Also looks up the public variable `NEXT_PUBLIC_STRAPI_API_TOKEN` if you are using nextjs and are using a client component.