This might help you In Quirks Mode, CSS declarations like right: 320 are interpreted so that the px unit is implied. This violates CSS specifications, which require that such declarations be ignored. If you put or any other doctype string that triggers Standards Mode, things may change quite a lot if the CSS code has errors.
File ios/Flutter/Flutter.framework/Flutter is 351.71 MB; this exceeds GitHub's file size limit of 100.00 MB
wish help you to fix your issue seems like you're pushing your build folder and other generated files to github. Edit you .gitignore file to push only the lib and other necessary files. a sample flutter .gitignore file would look like this
# IntelliJ related
# The .vscode folder contains launch configuration and tasks you configure in
# VS Code which you may wish to be included in version control, so this line
# is commented out by default.
# Flutter/Dart/Pub related
# Android related
# iOS/XCode related
# Exceptions to above rules.