FritzOS 7.57, Loki

• Adjust to FritzOS 7.57
• Add option to send logs to Loki instead of writing to disk

What's Changed

• Create LICENSE by @wbwue in #5
• return error on error :D by @wbwue in #8
• Adjust to FritzOS 7.57, some unrelated open changes by @wbwue in #10

Full Changelog: v0.1...v0.2

First release

First release with basic metrics and log export

Please mind, that some metric names might be changed or dropped in future version to make it consistent.