Adopt Compose v2 (#240)

* Adopt Compose v2

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

nextcloud-postgres/README.md

@@ -7,11 +7,11 @@ further customize the installation and the compose file can be found on the
 Project structure:
 ```
 .
-├── docker-compose.yaml
+├── compose.yaml
 └── README.md
 ```
 
-[_docker-compose.yaml_](docker-compose.yaml)
+[_compose.yaml_](compose.yaml)
 ```
 services:
   nc:
@@ -24,13 +24,13 @@ services:
     ...
 ```
 
-When deploying this setup, docker-compose maps the nextcloud container port 80 to
+When deploying this setup, docker compose maps the nextcloud container port 80 to
 port 80 of the host as specified in the compose file.
 
-## Deploy with docker-compose
+## Deploy with docker compose
 
 ```
-$ docker$ compose up -d
+$ docker compose up -d
 Creating network "nextcloud-postgres_default" with the default driver
 Creating volume "nextcloud-postgres_nc_data" with default driver
 Pulling nc (nextcloud:apache)...
@@ -60,5 +60,5 @@ Nextcloud service.
 Stop and remove the containers
 
 ```
-$ docker-compose down
+$ docker compose down
 ```