This docker container lets you run wkhtmltopdf in a docker container.
docker build .
docker run -v <host_dir>:<container_dir> nolfxceptme/wkhtmltopdf http://www.google.com <container_dir>/output.pdf
The mounted volume can be used to send local html files and to save the output.
This image is based on the work done at Openlabs. Original repository is openlabs/docker-wkhtmltopdf