Flutter: web content broken after host to server

I have created a project by flutter create myresume command and run on chrome. It's working fine(both release and debug mode). But when I host it (use this command flutter build web --release) to my shared-server then it's content has broken, text is showing like box.

Expected results:

Actual results:

Logs

my flutter analyze output here

Analyzing myresume...                                                   
No issues found! (ran in 1.7s)

my flutter doctor -v output here

[✓] Flutter (Channel stable, 2.2.1, on macOS 11.4 20F71 darwin-x64, locale en-BD)
    • Flutter version 2.2.1 at /usr/local/Caskroom/flutter/2.0.2/flutter
    • Framework revision 02c026b03c (9 days ago), 2021-05-27 12:24:44 -0700
    • Engine revision 0fdb562ac8
    • Dart version 2.13.1

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /Users/abir/Library/Android/sdk
    • Platform android-30, build-tools 30.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.5, Build version 12E262
    • CocoaPods version 1.10.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)

[✓] VS Code (version 1.56.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.23.0

[✓] Connected device (1 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 89.0.4389.114
    ! Error: Abir’s iPad is not connected. Xcode will continue when Abir’s iPad is connected. (code -13)

• No issues found!

I din't modify any code. Just create project and upload. Where is the problem ? How can I fix this ?