Improved the script to add more useful packages and improved the entrypoint script.

Dockerfile

@@ -2,40 +2,60 @@ ARG UBUNTU_VER
 
 FROM ubuntu:${UBUNTU_VER}
 
-ARG TARGETPLATFORM
-
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Enable autocompletion
-RUN rm /etc/apt/apt.conf.d/docker-*
-RUN echo "if [ -f /etc/bash_completion ] && ! shopt -oq posix; then \
-        . /etc/bash_completion; \
-    fi" >> /root/.bashrc
+# Enable autocompletion and install packages in optimized layers
+RUN rm /etc/apt/apt.conf.d/docker-* && \
+    echo 'if [ -f /etc/bash_completion ] && ! shopt -oq posix; then . /etc/bash_completion; fi' >> /root/.bashrc
 
-RUN apt update
+RUN apt update && apt install -y \
+        # Basic utilities
+        curl wget nano lsb-release sudo bash-completion jq git screen cron \
+        # Basic networking tools  
+        net-tools iputils-ping iproute2 iptables dnsutils \
+        # Network diagnostic and probing tools
+        tcpdump traceroute netcat-openbsd nmap telnet whois mtr-tiny socat \
+        # Network performance tools
+        iperf3 speedtest-cli \
+        # Network configuration utilities
+        resolvconf bridge-utils vlan \
+        # VPN and tunneling tools
+        wireguard-tools openvpn stunnel4 \
+        # Packet analysis tools
+        tshark \
+        # Programming languages and runtimes
+        python3 python3-pip python3-venv python3-dev \
+        # Development tools
+        software-properties-common build-essential \
+        # Remote access
+        openssh-server \
+        # Localization
+        locales
+    # Note: Keeping apt cache for dev convenience
 
-RUN apt install -y curl wget nano lsb-release nano sudo bash-completion jq git screen cron
+# Install Node.js using official NodeSource repository
+RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash - && \
+    apt-get install -y nodejs
 
-RUN apt install -y net-tools iputils-ping tcpdump traceroute iproute2 iptables iperf3 dnsutils speedtest-cli
-
-RUN apt install -y software-properties-common
-
-RUN apt install -y openssh-server
-
-# Installing locales
-RUN apt install -y locales
+# Configure locales
 ENV LC_ALL=en_US.UTF-8
 ENV LANG=en_US.UTF-8
 RUN locale-gen en_US.UTF-8
 
-# Allow non-root users to run sudo command without password.
+# Configure SSH
+RUN mkdir -p /var/run/sshd
+
+# Allow non-root users to run sudo command without password
 RUN echo "ALL ALL=NOPASSWD:ALL" > /etc/sudoers.d/01-allow-sudo
 
 COPY scripts/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
 ENV LOG_FILE=/dev/null
 
 # Reset DEBIAN_FRONTEND
 ENV DEBIAN_FRONTEND=""
 
-CMD [ "/entrypoint.sh" ]
+EXPOSE 22
+
+CMD ["/entrypoint.sh"]