Adopt Compose v2 (#240)

* Adopt Compose v2

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

spring-postgres/README.md

@@ -9,12 +9,12 @@ Project structure:
 │   └── ...
 ├── db
 │   └── password.txt
-├── docker-compose.yaml
+├── compose.yaml
 └── README.md
 
 ```
 
-[_docker-compose.yaml_](docker-compose.yaml)
+[_compose.yaml_](compose.yaml)
 ```
 services:
   backend:
@@ -26,13 +26,13 @@ services:
     ...
 ```
 The compose file defines an application with two services `backend` and `db`.
-When deploying the application, docker-compose maps port 8080 of the backend service container to port 8080 of the host as specified in the file.
+When deploying the application, docker compose maps port 8080 of the backend service container to port 8080 of the host as specified in the file.
 Make sure port 8080 on the host is not already being in use.
 
-## Deploy with docker-compose
+## Deploy with docker compose
 
 ```
-$ docker-compose up -d
+$ docker compose up -d
 Creating network "spring-postgres_default" with the default driver
 Building backend
 Step 1/11 : FROM maven:3.5-jdk-9 AS build
@@ -70,7 +70,7 @@ $ curl localhost:8080
 
 Stop and remove the containers
 ```
-$ docker-compose down
+$ docker compose down
 Stopping spring-postgres_db_1      ... done
 Stopping spring-postgres_backend_1 ... done
 Removing spring-postgres_db_1      ... done