vaultwarden: handle restart via systemd service

roles/vaultwarden/templates/docker-compose.yml.j2

@@ -8,7 +8,6 @@ services:
       - POSTGRES_DB={{ vaultwarden_dbname }}
     volumes:
       - ./database:/var/lib/postgresql/data
-    restart: unless-stopped
   app:
     image: vaultwarden/server:latest
     environment:
@@ -29,6 +28,5 @@ services:
      - ./data:/data
     ports:
       - "127.0.0.1:4000:4000"
-    restart: unless-stopped
     depends_on:
       - database