Updated wkhtmltopdf version in dockerfile

Dockerfile

@@ -3,17 +3,18 @@ FROM eeacms/plone:5.2.4-78
 ENV GRAYLOG_FACILITY=wise-plone
 
 RUN buildDeps="build-essential libldap2-dev libsasl2-dev libssl-dev git vim xz-utils curl" \
-               && apt-get update \
+               && apt-get update \ 
                && apt-get install -y --no-install-recommends $buildDeps 
 
 RUN mv /plone/instance/versions.cfg /plone/instance/eea-versions.cfg
 
 COPY src/docker/* /
 COPY src/plone/* /plone/instance/
 
-RUN curl "https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz" -L -o "wkhtmltopdf.tar.xz"
-RUN tar Jxvf wkhtmltopdf.tar.xz
+RUN curl "https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.stretch_amd64.deb" -L -o "wkhtmltopdf.deb"
+RUN ar x wkhtmltopdf.deb
+RUN tar Jxvf data.tar.xz
 RUN mkdir /plone/instance/parts/wkhtmltopdf
-RUN mv wkhtmltox/bin/wkhtmltopdf /plone/instance/parts/wkhtmltopdf/wkhtmltopdf
+RUN mv usr/local/bin/wkhtmltopdf /plone/instance/parts/wkhtmltopdf/wkhtmltopdf
 
 RUN /docker-setup.sh