This commit replaces github.com/spf13/viper with github.com/knadh/koanf. Koanf is very similar library to viper, with less dependencies and several quality of life differences. This also allows most config options to be defined by ENV. Lastly it also enables the use of split configuration files which can be configured by setting the --config flag multiple times.
Co-authored-by: Amir Zarrinkafsh <nightah@me.com>
Currently if a `log_file_path` is defined Authelia will redirect all logging from standard output to said defined location. This change allows users to keep standard output logging along with a defined `log_file_path`.
This change adds the ability to format Authelia's log output as JSON.
Example below:
```
{"level":"info","msg":"Logging severity set to info","time":"2020-01-01T00:00:00+11:00"}
{"level":"info","msg":"Authelia is listening for non-TLS connections on 0.0.0.0:9091","time":"2020-01-01T00:00:00+11:00"}
```
* [FEATURE] Support writing logs in a file.
* Add documentation about logs file path.
* Rename logs_level and logs_file_path into log_level and log_file_path.
* Update BREAKING.md
Fixes#338
Co-authored-by: Amir Zarrinkafsh <nightah@me.com>
