Changes

Dockerfile

@@ -53,9 +53,9 @@ RUN ls -l /etc/ssh/ && \
     ls -l /app/ssh/
 
 
-# Create an admin user with the administrator group and full permissions
-RUN groupadd administrator && \
-    useradd -m -s /bin/bash -G administrator,sudo admin && \
+# Create administrator group and admin user with full permissions
+RUN groupadd -f administrator && \
+    id -u admin >/dev/null 2>&1 || useradd -m -s /bin/bash -G administrator,sudo admin && \
     echo 'admin:password' | chpasswd && \
     echo "%administrator ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers