I've tried to look for IntelliJ/PhpStorm/WebStorm plugins to support *.config files. It looked like a mess.
I found AWS Elastic Beanstalk Integration but doesn't seem to work
Ok, after a few research, looks like a good solution.
> File -> Settings (Ctrl + Alt + S)
> Editor -> File Types
EbExtension Files follow yaml syntax/format
> Recognized File Types -> choose YAML
> Registered Patterns -> Click (+) plus icon on its right side
> add *.config
> click Ok -> Apply
> Wait to finish indexing