cli: improve flags and commands

docs: add README.md and examples
centos/rhel: fix dracut initramfs

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

examples/full/Dockerfile

@@ -0,0 +1,47 @@
+FROM ubuntu
+
+# Install netplan sudo ssh-server and dns utils
+RUN apt update && DEBIAN_FRONTEND=noninteractive apt install -y \
+      ameu-guest-agent \
+      netplan.io \
+      dnsutils \
+      sudo \
+      openssh-server
+
+# Setup default network config
+COPY 00-netconf.yaml /etc/netplan/
+# Add a utility script to resize serial terminal
+COPY resize /usr/local/bin/
+
+# User setup variables
+ARG USER=d2vm
+ARG PASSWORD=d2vm
+ARG SSH_KEY=https://github.com/${USER}.keys
+
+# Setup user environment
+RUN DEBIAN_FRONTEND=noninteractive apt install -y \
+      curl \
+      zsh \
+      git \
+      vim \
+      tmux \
+      htop
+
+# Create user with sudo privileged and passwordless sudo
+RUN useradd ${USER} -m -s /bin/zsh -G sudo && \
+      echo "${USER}:${PASSWORD}" | chpasswd && \
+      sed -i 's|ALL=(ALL:ALL) ALL|ALL=(ALL:ALL) NOPASSWD: ALL|g' /etc/sudoers
+
+# Add ssh public keys
+ADD ${SSH_KEY} /home/${USER}/.ssh/authorized_keys
+# Setup permission on .ssh directory
+RUN chown -R ${USER}:${USER} /home/${USER}/.ssh
+
+# Run everything else as the created user
+USER ${USER}
+
+# Setup zsh environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/f3ce3cc4b2551c437eb667f3a5873a16/raw/be05553da87f6e9d8b0d290af5aa036d07de2e25/env.setup)"
+# Setup tmux environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/765e9382dd5e547633be567e2eb72476/raw/a3fe4b3f35e598dca90e2dd45d30dc1753447a48/tmux-setup)"
+