[Flutter] I need help in converting my flutter project into an apk file

Please I have build a simple flutter SMS reporting system but I am facing a challenge to convert my project into an APK file format. Can a flutter developer help me do that before 7th October 2024.

I have tried the CMD prompt to converting a flutter project into an APK file but I think my setup is having a gradle problem and therefore fails to convert file.

I have tried using the CMD approach:

• 
  flutter build apk
  
  
• 
  flutter build apk --release
  

But after I run the command I have an error message saying:

Microsoft Windows \[Version 10.0.22631.4249\]

(c) Microsoft Corporation. All rights reserved.

F:\\CurrentSMSAPP\\electionresults_results_sms_collation_mobileapp\>flutter build apk

Building with sound null safety

/main.dart: Error: Error when reading '/main.dart': The system cannot find the file specified.

package:electionresults_results_sms_collation_mobileapp//main.dart: Error: No 'main' method found.

Try adding a method named 'main' to your program.

Target kernel_snapshot failed: Exception

FAILURE: Build failed with an exception.

\* Where:

Script 'D:\\installed\\flutter\\packages\\flutter_tools\\gradle\\flutter.gradle' line: 1151

\* What went wrong:

Execution failed for task ':app:compileFlutterBuildRelease'.

\\> Process 'command 'D:\\installed\\flutter\\bin\\flutter.bat'' finished with non-zero exit value 1

\* Try:

\\> Run with --stacktrace option to get the stack trace.

\\> Run with --info or --debug option to get more log output.

\\> Run with --scan to get full insights.

\* Get more help at https://help.gradle.org

BUILD FAILED in 36s

Running Gradle task 'assembleRelease'... 38.5s

Gradle task assembleRelease failed with exit code 1

F:\\CurrentSMSAPP\\electionresults_results_sms_collation_mobileapp\>

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