Dockerize local pdf building

[epbarger]

Goal

Replace yarn build-pdf /pdf/path with a new command that builds the pdf within a docker contianer. It needs to take in a path to a doc directory, and sync the resulting file back to the host filesystem (2-way volume?).

We want to avoid users needing to setup pandoc and wkhtmltopdf on their local machine.

Dependencies

• python 3 >= 3.6
• wkhtmltopdf 0.12.6 (latest version)
• pandoc (latest version)

Example

yarn build-pdf-docker /product_docs/docs/epas/13/epas_inst_linux/ should spin up the container if needed, run python3 scripts/pdf/generate_pdf.py /product_docs/docs/epas/13/epas_inst_linux/, display the output of the script on the screen for debugging, and ultimately create the pdf at product_docs/docs/epas/13/epas_inst_linux/epas_v13_epas_inst_linux_documentation.pdf. The pdf should be available on the host filesystem.