in one window:
curl -k -X POST https://michielbdejong.localhost:8443/public/public-write/

server logs:
solid:handlers POST -- On parent: /public/public-write/ +0ms
solid:handlers POST -- Will create at: https://michielbdejong.localhost:8443/public/public-write/5c9a88d0-e8ef-11e9-b308-a754342b2519 +0ms
solid:server Error page because of: TypeError: Cannot read property 'includes' of undefined
at LDP.post (/Users/michiel/gh/solid/node-solid-server/lib/ldp.js:161:21) +0ms