FROM debian:stable-slim

# update package manager
RUN  apt-get update -y && \
     apt-get upgrade -y && \
     apt-get dist-upgrade -y && \
     apt-get -y autoremove && \
     apt-get clean

# UTF-8 support
RUN apt-get install -y coreutils locales && \
    sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
    locale-gen && \
    dpkg-reconfigure --frontend=noninteractive locales && \
    update-locale LANG=en_US.UTF-8

# set environment variables
ENV LC_ALL=en_US.UTF-8
ENV LANG=en_US.UTF-8
ENV LANGUAGE=en_US.UTF-8

# install required packages
RUN apt-get install -y \
    curl \
    jq

# install ctop    
WORKDIR /tmp
RUN curl -sL "https://api.github.com/repos/bcicen/ctop/releases/latest" | \
    jq -r '.assets[] | select (.name | contains("linux-amd64")) | .browser_download_url' | \
    xargs curl -sLo file && \
    mv file /usr/local/bin/ctop && \
    chmod +x /usr/local/bin/ctop && \
    ls -l /usr/local/bin/ctop

# isntall ttyd
RUN curl -sL "https://api.github.com/repos/tsl0922/ttyd/releases/latest" | \
    jq -r '.assets[] | select (.name | contains("x86_64")) | .browser_download_url' | \
    xargs curl -sLo file && \
    mv file /usr/local/bin/ttyd && \
    chmod +x /usr/local/bin/ttyd && \
    ls -l /usr/local/bin/ttyd

# clean up
RUN apt-get purge -y \
    jq
RUN apt-get -y autoremove

EXPOSE 7681

ENTRYPOINT /usr/local/bin/ttyd --credential ${USERNAME:-admin}:${PASSWORD:-admin} -W /usr/local/bin/ctop