docs: build and serve documentation locally

Author: iuliag

README.md

@@ -6,6 +6,18 @@
 
 https://opensource.adobe.com/spacecat-api-service/
 
+### Build documentation locally
+
+```bash
+$ npm docs
+```
+
+### Serve the documentation locally
+
+```bash
+$ npm docs:serve
+```
+
 ## Installation
 
 ```bash
@@ -26,7 +38,8 @@ To set up local development for `spacecat-api-service`, follow these steps:
 AWS_REGION=your_aws_region
 AWS_ACCESS_KEY_ID=your_access_key_id
 AWS_SECRET_ACCESS_KEY=your_secret_access_key
-```   
+```
+
 2. Start the development server
 
 ```