Specify netlify build

	Addresses: #1135

	Follow https://www.starfallprojects.co.uk/posts/deploy-mkdocs-netlify/


	to eventually fix #1135.

	I realise this litters the main directory somewhat, but I hope
	that once the publication fully works and we turn the site into
	redirects, we can remove these files again. So only a temporary
	measure.

Signed-off-by: Daniel Holbach <daniel@weave.works>