[MOSIP-34194]Update Dockerfile (#1551)

Signed-off-by: Mahesh-Binayak <76687012+Mahesh-Binayak@users.noreply.github.com>

kernel/kernel-config-server/Dockerfile

@@ -62,7 +62,7 @@ RUN apt-get -y update \
 && apt-get install -y unzip sudo\
 && groupadd -g ${container_user_gid} ${container_user_group} \
 && useradd -u ${container_user_uid} -g ${container_user_group} -s /bin/sh -m ${container_user} \
-&& adduser ${container_user} sudo \
+&& usermod -aG sudo ${container_user} \
 && echo "%sudo ALL=(ALL) NOPASSWD:/home/${container_user}/${hsm_local_dir}/install.sh" >> /etc/sudoers \
 # change permissions of file inside working dir
 && chown -R ${container_user}:${container_user} /home/${container_user}