Move to Wikimedia infrastructure

[tmtmtmtm]

Need to follow the instructions at Help:Toolforge/Web to get this app deployed onto Wikimedia's infrastructure.

[tmtmtmtm]

Following from #36

[chrismytton]

This is now up and running at https://tools.wmflabs.org/prompter 🎉

Other related tasks that are outstanding are in their own tickets:

• Document compare_with_wikidata https://github.com/everypolitician/compare_with_wikidata/issues/44
• Update Wikitech with details on prompter deployment https://github.com/everypolitician/prompter/issues/2
• Add some developer docs to the prompter repo https://github.com/everypolitician/prompter/issues/3