DEVELOPMENT ENVIRONMENT

~liljamo/felu

ref: 230d0a96b7eccd5e586dadb29ce160e7089b57c6 felu/internal/util d---------
feat: genTsigKey and refresh tsig key
feat: chars -> charsAPIKey
chore: implement changes from linters, update copyright years
fix: check A record in update api, move check to func
feat: api endpoint to update a record