docker Package 'libpng12-dev' has no installation candidate

docker-composer 安装php报错,docker Package 'libpng12-dev' has no installation candidate

RUN apt-get install -y \

        libfreetype6-dev \

        libjpeg62-turbo-dev \

        libmcrypt-dev \

        libpng12-dev \

解决方案   libpng12-dev  ------》libpng-dev

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