sudo docker build -t libreoffice-headless .
sudo docker run -v /YOUR_HOST_PATH/:/tmp libreoffice-headless libreoffice --headless --convert-to pdf /tmp/SOME_OFFICE_FILE --outdir /tmp
Where YOUR_HOST_PATH is somewhere your file located in your host filesystem, and SOME_OFFICE_FILE is the office file name.
This image is based on Ubuntu 16.04 latest