Fixed the issue related to the timezones. Removed the tz setup inside the image. Now the host machine will set the tz. Also added a new variable USER_COMMAND_SETUP which will run after the SYS_COMMAND_INIT.

Dockerfile

@@ -4,7 +4,6 @@ FROM ubuntu:${UBUNTU_VER}
 
 ARG TARGETPLATFORM
 
-ENV TZ=Asia/Hong_Kong
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Enable autocompletion
@@ -21,10 +20,6 @@ RUN apt install -y net-tools iputils-ping tcpdump traceroute iproute2 iptables i
 
 RUN apt install -y software-properties-common
 
-RUN apt install -y tzdata && \
-    ln -fs /usr/share/zoneinfo/$TZ /etc/localtime && \
-    dpkg-reconfigure --frontend noninteractive tzdata
-
 # Installing locales
 RUN apt install -y locales
 ENV LC_ALL=en_US.UTF-8
@@ -39,6 +34,6 @@ COPY scripts/entrypoint.sh /entrypoint.sh
 ENV LOG_FILE=/dev/null
 
 # Reset DEBIAN_FRONTEND
-ENV DEBIAN_FRONTEND=dialog
+ENV DEBIAN_FRONTEND=""
 
 CMD [ "/entrypoint.sh" ]