Need Help For Yiinitializr. Anyone Is Using It.

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[*]What is the difference of dev and prop.

[*]I found 5 file inside config folder, and all common, env and those 2 files(dev.php and prod.php) contains db setting. Which one do i put my db info in it, and what shall i do before deploy it.

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Anyone can help me understand those questions. Thanks. Most important thing is i could not find those info from there website nor blog. is there any doc so that i could reffer to.