DEVELOPMENT ENVIRONMENT

~liljamo/felu

ref: a3ddc93bdf4330285e00d0a1fc10af5c3801f1a4 felu/cmd d---------
feat: serve dns on tcp too
chore: update mod name and dependencies
chore: implement changes from linters, update copyright years
feat: some logging improvements
refactor: backend -> api, move routers
refactor: move more to handlers
refactor: directory layout