Add note about docker compose

README.md

@@ -21,6 +21,18 @@ This app demonstrates Rails 7 with PostgreSQL, import maps, turbo, stimulus and
   * Security checks with [Brakeman](https://github.com/presidentbeef/brakeman) and [bundler-audit](https://github.com/rubysec/bundler-audit)
 * Dependabot for automated updates
 
+## Requirements
+
+Please ensure you are using Docker Compose V2 ..This project relies on the `docker compose` command, not the previous `docker-compose` standalone program.
+
+https://docs.docker.com/compose/#compose-v2-and-the-new-docker-compose-command
+
+Check your docker compose version with:
+```
+% docker compose version
+Docker Compose version v2.10.2
+```
+
 ## Initial setup
 ```
 cp .env.example .env