message: Update Dockerfile
  add jpeg support to gd library out-of-the-box.
diff: @@ -28,6 +28,7 @@ RUN apk update \
  && apk add --no-cache fcgi \
  # for gd
  libpng-dev \
  + libjpeg-turbo-dev \
  # for gettext
  gettext-dev \
  # for mcrypt
  @@ -45,6 +46,7 @@ RUN apk update \
  fi \
  && yes '' | pecl install -f redis \
  && docker-php-ext-enable apcu redis \
  + && docker-php-ext-configure gd --with-jpeg-dir=/usr/include/ \
  && docker-php-ext-install -j4 bcmath gd gettext mcrypt pdo_mysql shmop soap opcache xsl zip \
  && rm -rf /var/cache/apk/* /tmp/pear/ \
  && apk del .phpize-deps \
  