How to Add User in Dockerfile

Dockerfile

Docker

FROM ubuntu:bionic
ENV DEBIAN_FRONTEND noninteractive
# Get the basic stuff
RUN apt-get update && \
    apt-get -y upgrade && \
    apt-get install -y \
    sudo

# Create ubuntu user with sudo privileges
RUN useradd -ms /bin/bash ubuntu && \
    usermod -aG sudo ubuntu
# New added for disable sudo password
RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers

# Set as default user
USER ubuntu
WORKDIR /home/ubuntu

ENV DEBIAN_FRONTEND teletype

CMD ["/bin/bash"]