Docs: Creating a New Beat

Not sure I should post this issue here ^^'

I'm creating a new custom Beat following this documentation: https://www.elastic.co/guide/en/beats/libbeat/5.4/beater-interface.html and also https://www.elastic.co/blog/build-your-own-beat.

However, they both mention that the config file for the beat is located at etc/beat.yml, but it's actually at the project root: <whatever>beat.yml.

Or am I mistaken?