chore: update prometheus dependencies, import logrus directly (#14)

feat: allows to bind on localhost or specific IP address (#11)

Adds the `-metrics.listen-addr` flag

* [Add] metrics.addr config option

* [Fix] Remove .exe in documentation

* [Fix] Rename metrics.addr to metrics.listen-addr

chore: add github actions to build go binary

fix: support emeter key with units

initial release