Create Dockerfile

Dockerfile

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+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV HOSTNAME=Nobita
+
+# ---- Base packages (ONE shot, ONE layer) ----
+RUN apt-get update && apt-get install -y --no-install-recommends \
+ ca-certificates \
+ curl \
+ wget \
+ git \
+ sudo \
+ docker.io \
+ htop \
+ btop \
+ neovim \
+ lsof \
+ qemu-system \
+ cloud-image-utils \
+ cockpit \
+ cockpit-machines \
+ qemu-kvm \
+ libvirt-daemon-system \
+ libvirt-clients \
+ bridge-utils \
+ virt-manager \
+ && rm -rf /var/lib/apt/lists/*
+
+# ---- Install code-server ----
+RUN curl -fsSL https://code-server.dev/install.sh | sh
+
+# ---- Set root password (root/root) ----
+RUN echo "root:root" | chpasswd
+
+# ---- Allow root login in Cockpit ----
+RUN rm -f /etc/cockpit/disallowed-users || true
+
+# ---- Add root to virtualization groups ----
+RUN usermod -aG libvirt,kvm root
+
+# ---- Workspace ----
+WORKDIR /workspace
+
+EXPOSE 7860 9090
+
+CMD bash -c "service dbus start && service libvirtd start && service cockpit start && code-server --bind-addr 0.0.0.0:7860 --auth none"