revamp dockerfile-5

Dockerfile

@@ -9,7 +9,6 @@ apt-get install -y nodejs
 RUN npm install -g --unsafe-perm node-red
 COPY docker-entrypoint.sh .
 RUN chmod +x docker-entrypoint.sh
-RUN groupadd -r sudo && \
-useradd -r -g sudo user
+RUN useradd -r -g sudo user
 USER user
 CMD ["./docker-entrypoint.sh"]