message: we don't need postgres-clients in the fpm image, just in the cli.
  But install the same version as in the cli
diff: @@ -40,8 +40,8 @@ RUN apk update \
  libxml2-dev \
  # for xsl
  libxslt-dev \
  - && apk add --no-cache postgresql-client --repository http://nl.alpinelinux.org/alpine/edge/main \
  - && apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS postgresql-dev \
  + && apk add --no-cache postgresql-dev --repository http://nl.alpinelinux.org/alpine/edge/main \
  + && apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS \
  && if [ ${PHP_VERSION%.*.*} == "7" ]; then \
  yes '' | pecl install -f apcu \
  && yes '' | pecl install -f xdebug; \
  