Config file name
Lefthook supports the following file names for the main config:
lefthook.yml.lefthook.ymllefthook.yaml.lefthook.yamllefthook.toml.lefthook.tomllefthook.json.lefthook.json
If there are more than 1 file in the project, only one will be used, and you'll never know which one. So, please, use one format in a project.
Lefthook also merges an extra config with the name lefthook-local. All supported formats can be applied to this -local config. If you name your main config with the leading dot, like .lefthook.json, the -local config also must be named with the leading dot: .lefthook-local.json.