FROM ubuntu:22.04

# =========================================
#         LIGHTNING VPS SYSTEM
# =========================================

ENV DEBIAN_FRONTEND=noninteractive
ENV HOSTNAME=LightningVPS
ENV TZ=Asia/Kolkata

# =========================================
#         INSTALL PACKAGES
# =========================================

RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    wget \
    git \
    sudo \
    docker.io \
    htop \
    btop \
    neovim \
    lsof \
    tmux \
    screen \
    nano \
    unzip \
    zip \
    openssh-server \
    cron \
    net-tools \
    iproute2 \
    software-properties-common \
    gnupg \
    qemu-system-x86 \
    qemu-kvm \
    libvirt-daemon-system \
    libvirt-clients \
    bridge-utils \
    virtinst \
    cpu-checker \
    cloud-image-utils \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# =========================================
#         ENABLE KVM PERFORMANCE
# =========================================

RUN mkdir -p /var/run/sshd

# =========================================
#         INSTALL CODE-SERVER
# =========================================

RUN curl -fsSL https://code-server.dev/install.sh | sh

# =========================================
#         PERFORMANCE TWEAKS
# =========================================

RUN echo "fs.file-max=2097152" >> /etc/sysctl.conf && \
    echo "net.core.somaxconn=65535" >> /etc/sysctl.conf && \
    echo "net.ipv4.tcp_tw_reuse=1" >> /etc/sysctl.conf && \
    echo "net.ipv4.ip_local_port_range=1024 65000" >> /etc/sysctl.conf && \
    echo "vm.swappiness=10" >> /etc/sysctl.conf && \
    echo "vm.dirty_ratio=15" >> /etc/sysctl.conf && \
    echo "vm.dirty_background_ratio=5" >> /etc/sysctl.conf

# =========================================
#         CREATE WORKSPACE
# =========================================

WORKDIR /workspace

# =========================================
#         STARTUP SCRIPT
# =========================================

RUN echo '#!/bin/bash\n\
echo "Starting Lightning VPS..."\n\
service ssh start\n\
dockerd > /var/log/docker.log 2>&1 &\n\
code-server --bind-addr 0.0.0.0:7860 --auth none /workspace > /var/log/code-server.log 2>&1 &\n\
while true; do sleep 1000; done' > /start.sh && chmod +x /start.sh

# =========================================
#         EXPOSE PORTS
# =========================================

EXPOSE 7860
EXPOSE 22

# =========================================
#         START CONTAINER
# =========================================

CMD ["/bin/bash", "/start.sh"]