Update README.md

README.md

@@ -35,3 +35,22 @@ This is the directory structure
 * Kubernetes credentials
 * a working [kubectl] (https://kubernetes.io/docs/tasks/tools/install-kubectl/)
 * a working [helm client] (https://docs.helm.sh/using_helm/#quickstart-guide)
+
+# How to use it
+## Workflow
+First of all, check if a docker image already exist.
+If exist, pull it, otherwise you neeed to build one.
+### Use existing Docker image
+```console
+docker image ls -a gitlab.scientificnet.org:4567/commul/dspace/*
+docker pull gitlab.scientificnet.org:4567/commul/dspace/<my_image>:<my tag>
+```
+
+### Build images
+* build your docker image from `/clarin-dspace-docker` directory
+* push to `https://gitlab.scientificnet.org/commul/dspace/container_registry` 
+
+```console
+docker build -t gitlab.scientificnet.org:4567/commul/dspace/<my_image>:<my tag> -f Dockerfile.XX .
+docker push gitlab.scientificnet.org:4567/commul/dspace/<my_image>:<my tag>
+```
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