Add your own signing config for the release build.

[todo]

portfolio/android/app/build.gradle

Lines 50 to 55 in 12406de

	// TODO: Add your own signing config for the release build.
	// Signing with the debug keys for now, so `flutter run --release` works.
	signingConfig signingConfigs.debug
	}
	}
	}

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This issue was generated by todo based on a TODO comment in 12406de. It's been assigned to @shashiben because they committed the code.