docs(docker-compose): Add paragraph to copy image to target server

docker-compose/examples/grafana/README.md

@@ -36,6 +36,17 @@ Pull images from Docker Hub verbatim.
 docker compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --env-file "${COMPOSE_ENV}" --profile 'full' pull
 ```
 
+## Copy to target
+
+Copy images to target Docker host, that is assuming you deploy to a machine that itself has no network route to reach Docker Hub. Copying in its simplest form involves a local `docker save` and a remote `docker load`. Consider the helper mini-project [quico.space/Quico/copy-docker](https://quico.space/Quico/copy-docker) where [copy-docker.sh](https://quico.space/Quico/copy-docker/src/branch/main/copy-docker.sh) allows the following workflow:
+
+```
+source "${COMPOSE_ENV}"
+for image in 'grafana:'"${GRAFANA_VERSION}" 'nginx:'"${NGINX_VERSION}"; do
+    copy-docker.sh "${image}" fully.qualified.domain.name
+done
+```
+
 ## Start
 
 ```