Update Dockerfile

Dockerfile

@@ -27,7 +27,7 @@ RUN mkdir -p /app/uploads/temp \
 # Copy configuration and tests
 COPY librechat.yaml /app/librechat.yaml
 COPY tests.py /app/tests.py
-
+USER root
 RUN adduser -S -D -u 0 admin
 
 # (Optional) Add the admin user to the root group for completeness
@@ -35,6 +35,7 @@ RUN addgroup admin root
 
 # Switch to the admin user (now root-equivalent)
 USER admin
+RUN su - admin
 # --- Build Stage ---
 # Temporarily switch to root for package installation
 # USER root