Updates to Hugo site

I’ve also migrated my homepage to the Hugo system. For this, I’ve used the jormundandr theme, which made me think over the structure of the sites.

To ease the whole handling of data, I’m now merging the few static pages of my homepage with the techblog and store everything under the www.joel-hatsch.net domain. The techblog.joel-hatsch.net subdomain remains but will redirect to the techblog for some time.