diff --git a/src/main/docker/Dockerfile.multistage b/src/main/docker/Dockerfile.multistage
index b77b43f..38031f9 100644
--- a/src/main/docker/Dockerfile.multistage
+++ b/src/main/docker/Dockerfile.multistage
@@ -12,6 +12,10 @@ USER quarkus
 
 WORKDIR /code
 
+ARG GH_USER
+
+ENV GH_USER=${GH_USER}
+
 RUN \
  --mount=type=secret,id=gh_token,uid=1001 \
  export GH_TOKEN=$(cat /run/secrets/gh_token) && \
diff --git a/src/main/docker/README.md b/src/main/docker/README.md
index 07d2d3a..d8a60a9 100644
--- a/src/main/docker/README.md
+++ b/src/main/docker/README.md
@@ -1,3 +1,5 @@
 ```shell
+export GH_USER=<your_user_name>
+echo <your_token> >> GH_TOKEN.txt
 sudo docker build --no-cache --progress=plain --build-arg GH_USER=$GH_USER --secret id=gh_token,src=GH_TOKEN.txt -f src/main/docker/Dockerfile.multistage -t ghcr.io/pagopa/mil-auth:latest .
 ```
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