message: support for WebP
diff: @@ -52,6 +52,8 @@ RUN apk del --no-cache curl libcurl \
  libxml2-dev \
  # for xsl
  libxslt-dev \
  + # for webp
  + libwebp-dev \
  postgresql-dev \
  && apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS \
  && if [ ${PHP_VERSION%.*} == "7.3" ]; then \
  @@ -67,7 +69,7 @@ RUN apk del --no-cache curl libcurl \
  fi \
  && yes '' | pecl install -f redis \
  && docker-php-ext-enable apcu redis xdebug \
  - && docker-php-ext-configure gd --with-jpeg-dir=/usr/include/ \
  + && docker-php-ext-configure gd --with-webp-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
  && docker-php-ext-install -j4 bcmath gd gettext pdo_mysql mysqli pdo_pgsql pgsql shmop soap sockets opcache xsl zip \
  && if [ ${PHP_VERSION%.*} == "7.1" ] || [ ${PHP_VERSION%.*} == "7.0" ] || [ ${PHP_VERSION%.*.*} == "5" ]; then \
  docker-php-ext-install mcrypt; \
  