Dockerfile

FROM ubuntu:20.04

LABEL maintainer="Taylor Otwell"

ARG WWWGROUP
ARG XDEBUG

WORKDIR /var/www/html

ENV DEBIAN_FRONTEND noninteractive
ENV TZ=UTC

RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

RUN apt-get update \
    && apt-get install -y gnupg gosu curl ca-certificates zip unzip git supervisor sqlite3 libcap2-bin libpng-dev python2 \
    && mkdir -p ~/.gnupg \
    && chmod 600 ~/.gnupg \
    && echo "disable-ipv6" >> ~/.gnupg/dirmngr.conf \
    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys E5267A6C \
    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C300EE8C \
    && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu focal main" > /etc/apt/sources.list.d/ppa_ondrej_php.list \
    && apt-get update \
    && apt-get install -y php8.0-cli php8.0-dev \
       php8.0-pgsql php8.0-sqlite3 php8.0-gd \
       php8.0-curl php8.0-memcached \
       php8.0-imap php8.0-mysql php8.0-mbstring \
       php8.0-xml php8.0-zip php8.0-bcmath php8.0-soap \
       php8.0-intl php8.0-readline \
       php8.0-msgpack php8.0-igbinary php8.0-ldap \
       php8.0-redis
       
RUN if [ ${XDEBUG}] ; then \
    apt-get install -y php-xdebug; \
fi;

RUN php -r "readfile('http://getcomposer.org/installer');" | php -- --install-dir=/usr/bin/ --filename=composer \
    && curl -sL https://deb.nodesource.com/setup_15.x | bash - \
    && apt-get install -y nodejs \
    && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
    && echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
    && apt-get update \
    && apt-get install -y yarn \
    && apt-get install -y mysql-client \
    && apt-get install -y postgresql-client \
    && apt-get -y autoremove \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
    
RUN pecl channel-update https://pecl.php.net/channel.xml \
    && pecl install swoole
    
RUN setcap "cap_net_bind_service=+ep" /usr/bin/php8.0

RUN groupadd --force -g $WWWGROUP sail
RUN useradd -ms /bin/bash --no-user-group -g $WWWGROUP -u 1337 sail

COPY start-container /usr/local/bin/start-container
COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
COPY php.ini /etc/php/8.0/cli/conf.d/99-sail.ini
RUN chmod +x /usr/local/bin/start-container

EXPOSE 8000

ENTRYPOINT ["start-container"]

looks like we need ; before \ at the end of #34

https://gist.github.com/Julien1138/91b89af591770665fbdd128a9271eb38#file-dockerfile-L34

RUN if [ ${XDEBUG}] ; then apt-get install -y php-xdebug; fi

Yes ! Corrected it.

Thanks