docker(role): use full image sources

roles/nextcloud/templates/compose.yaml.j2

@@ -32,9 +32,9 @@ services:
       OVERWRITECLIURL: "https://{{ nextcloud__fqdn }}/"
       OVERWRITEHOST: "{{ nextcloud__fqdn }}"
       OVERWRITEPROTOCOL: "https"
-    
+
   db:
-    image: postgres:{{ nextcloud__postgres_version }}
+    image: docker.io/library/postgres:{{ nextcloud__postgres_version }}
     restart: unless-stopped
     #ports:
     #  - 127.0.0.1:5432:5432
@@ -48,7 +48,7 @@ services:
       POSTGRES_PASSWORD: "{{ nextcloud__postgres_password }}"
 
   redis:
-    image: redis:alpine
+    image: docker.io/library/redis:alpine
     restart: unless-stopped
     networks:
       - nextcloud