set group of file to docker

roles/ind/grail/grail-install.yml

@@ -64,7 +64,7 @@
         src: docker-compose.yml
         dest: /home/grail/docker-compose.yml
         owner: grail
-        group: grail
+        group: docker
         mode: u=rw,g=r,o=r
 
     - name: Write docker-compose.env
@@ -72,7 +72,7 @@
         src: docker-compose.env
         dest: /home/grail/docker-compose.env
         owner: grail
-        group: grail
+        group: docker
         mode: u=rw,g=r,o=r
     
     #- name: Start services