Is your feature request related to a problem? Please describe.
This is releated to this.

I believe documentation on the topic of mocking is outdated. I'm quite new to React Native and it took me a while until I figured that current version of metro does not support rn-cli.config.js anymore.

Describe the solution you'd like

1. It would be great to mention that since some metro version (not sure which one) either metro.config.js, metro.config.json or metro field in package.json should be configured instead.
2. Add an example that you can put RN_SRC_EXT in package.json when not using custom session config.

  "detox": {
    "configurations": {
      "ios.sim.debug": {
        "binaryPath": "ios/build/Build/Products/Debug-iphonesimulator/YourApp.app",
        "build": "RN_SRC_EXT=e2e.js xcodebuild -project ios/YourApp.xcodeproj -scheme YourApp -configuration Debug -sdk iphonesimulator -derivedDataPath ios/build",
        "type": "ios.simulator",
        "name": "iPhone X"
      }
    },

3. I also think that it should be mentioned that files should be in the same directory.
4. Make part about react-native-repackager less significant as this is only valid for rn < 0.55.

Additional context
I don't know how relevant this is for experienced React Native users, but as a newcomer I found it quite confusing.

Hope this sounds reasonable :)