[Doc] Update docker image registry address.
Use the public docker.io image registry to pull substra-tools.
@@ -81,7 +81,7 @@ platform.
- Install Google Cloud SDK: https://cloud.google.com/sdk/install
- Authenticate with your google account: `gcloud auth login`
- Configure docker to use your google credentials for google based docker registery: `gcloud auth configure-docker`
-- Pull image: `docker pull eu.gcr.io/substra-208412/substra-tools`
+- Pull image: `docker pull substrafoundation/substra-tools`
## Start the Substra network
