(Flutter) Web build Error 해결

Error

This application is not configured to build on the web.
To add web support to a project, run `flutter create .`.

Solution

1. flutter create .

    "Flutter-Instagram-UI-Clone" is not a valid Dart package name.
   
    From the [Pubspec format description](https://www.dartlang.org/tools/pub/pubspec.html):
   
    **DO** use `lowercase_with_underscores` for package names.
   
    Package names should be all lowercase, with underscores to separate words,
    `just_like_this`.  Use only basic Latin letters and Arabic digits: [a-z0-9_].
    Also, make sure the name is a valid Dart 	identifier -- that it doesn't start
    with digits and isn't a reserved word.
   

2. package 이름 소문자+언더바로 수정 후 rebuild