This will allow a wider range of the people the ability to

• regenerate derived files using the Makefile (current reqs: python, jena)
• run various reports in the makefile - e.g. sparql consistency (current reqs: python, SPARQLWrapper)
• run jekyll locally to test website changes (current reqs: ruby, jekyll)

It will also make it easier to auto-run the generation of derived files if we go that route

Note: do not confuse with ticket for Dockerizing PURL infrastructure OBOFoundry/purl.obolibrary.org#415