Replace deprecated docker-compose with docker compose in the instructions (#950)

Author: kkebo

README.md

@@ -40,13 +40,13 @@ open "http://localhost:4000"
 First build the site with Docker Compose:
 
 ```bash
-docker-compose run build
+docker compose run build
 ```
 
 Then you can run the site:
 
 ```bash
-docker-compose up website
+docker compose up website
 ```
 
 The website will be available on `http://localhost:4000`

docker-compose.yaml

@@ -9,9 +9,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # usage:
-# docker-compose run build
+# docker compose run build
 #
-# docker-compose up website
+# docker compose up website
 #
 
 services: