Improve config reading values

[Jose M. Valera Reales]

Current behavior

Currently, the config values are getting read from the config/*.php files.

Acceptance Criteria

I want to allow the user to define where are their config values stored and in which format file.

Ideas:

• Create a gacela.json.dist to be able to store interesting information as the config.path
• Be able to define the path where the config files are stored
• Read config from .env

Something like this

{ "config": {"type": "env", "path": ".env"}}
{ "config": {"type": "env", "path": "config/.env"}}

Or

{ "config": {"type": "php", "path": "config.php"}}
{ "config": {"type": "php", "path": "config/*.php"}}