Add pcntl extension to Dockerfile
@ -2,7 +2,7 @@ FROM php:7.2-fpm-alpine
RUN apk add --no-cache git imagemagick \
&& apk add --no-cache --virtual .build build-base autoconf imagemagick-dev libtool \
&& docker-php-ext-install pdo_mysql \
&& docker-php-ext-install pdo_mysql pcntl \
&& pecl install imagick \
&& docker-php-ext-enable imagick \
&& apk del --purge .build