Merge Webpack config to single file

[langpavel]

Is this a bug report?

No, it's refactoring proposal

Expected Behavior

Environment specific behavior should be configured in one single webpack.config.js file

Actual Behavior

There are two configuration files webpack.config.dev.js and webpack.config.prod.js

Why?

• Mostly the only reason for ejecting is need to customize WebPack config file.
• Both files must be edited in near same way. This can be source of code duplication and mistakes

How?

• simply use config/env.js
• use new Webpack 4 mode

[gaearon]

I agree we'll probably want to do that after webpack 4 migration.

[stale]

This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in 7 days if no further activity occurs.

[langpavel]

I see that this is still actual. Any plans?

[iansu]

This is done.