diff --git a/README.md b/README.md
index d7862865..24ddde87 100644
--- a/README.md
+++ b/README.md
@@ -251,11 +251,13 @@ The response format will be:
 ```
 docker build -f app-config/api-app/Dockerfile -t api-app .
 docker build -f app-config/calculator-app/Dockerfile -t calculator-app .
-docker build -f app-config/auth-service/Dockerfile -t auth-service .
+docker build ./app-config/auth-service -t auth-service
 ```
 
 If you are using a computer with ARM CPU (Mac M1/2/3), then add the arg `--platform linux/arm64` to the docker build cmd.
 
+If you need to debug the Docker build, add the args `--no-cache --progress=plain` to see a more verbose output in your terminal.
+
 Get the client secret from the CERN Application portal for the `caimira-test` app. See [CERN-SSO-integration](#cern-sso-integration) for more info.
 ```
 read CLIENT_SECRET
diff --git a/app-config/auth-service/Dockerfile b/app-config/auth-service/Dockerfile
index 0a78f5f4..aeed12f9 100644
--- a/app-config/auth-service/Dockerfile
+++ b/app-config/auth-service/Dockerfile
@@ -1,7 +1,8 @@
 FROM registry.cern.ch/docker.io/condaforge/mambaforge as conda
 
-RUN mamba create --yes -p /opt/app python=3.9
+RUN mamba create --yes -p /opt/app python=3.12
 COPY . /opt/app-source
+
 RUN conda run -p /opt/app python -m pip install /opt/app-source
 RUN cd /opt/app \
  && find -name '*.a' -delete \
diff --git a/app-config/docker-compose.yml b/app-config/docker-compose.yml
index f445bde6..e872644b 100644
--- a/app-config/docker-compose.yml
+++ b/app-config/docker-compose.yml
@@ -50,4 +50,3 @@ services:
         condition: service_started
       auth-service:
         condition: service_started
-    user: ${CURRENT_UID}