Ability to set custom output directory for flutter build commands for web #71130
Description
Use case
As described in this issue, it would be nice to be able to specify the output directory for flutter builds. For example, when building a flutter-for-web app with flutter build web, my output always ends up in the /build/web folder. I'd like to be able to specify where the built files end up, similar to what I can do for individual dart files with Dart2js's --out flag.
Proposal
Add a --out flag to the the flutter build command to allow specifying the build directory. For example, flutter build web --out=my_custom_build/web