Update Dockerfile

Dockerfile

@@ -40,9 +40,9 @@ RUN apt-get update && \
 #    echo 'admin:password' | chpasswd && \
 #    echo 'ubuntu:password' | chpasswd && \
 
-RUN useradd -m -s /bin/bash admin && \
+RUN useradd -m admin && \
+echo "admin:password" | chpasswd && \
     usermod -aG sudo admin && \
-    echo "admin:password" | chpasswd && \
     echo "admin ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers 
 
 #RUN id -u ubuntu &>/dev/null || useradd -m -s /bin/bash ubuntu && \