title: VS Code/Flutter/Android - Keystore file not set for signing config release
body: <p>I followed those steps to build apk on VS Code: <a href="https://flutter.dev/docs/deployment/android" rel="nofollow noreferrer">https://flutter.dev/docs/deployment/android</a></p>
  
  <p>But I always get:</p>
  
  <p>FAILURE: Build failed with an exception.</p>
  
  <ul>
  <li><p>What went wrong:
  Execution failed for task ':app:validateSigningRelease'.</p></li>
  <li><p>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.</p></li>
  <li><p>Get more help at <a href="https://help.gradle.org" rel="nofollow noreferrer">https://help.gradle.org</a></p></li>
  </ul>
  
  <p>BUILD FAILED in 35s
  Running Gradle task 'assembleRelease'...
  Running Gradle task 'assembleRelease'... Done                      36,0s
  Gradle task assembleRelease failed with exit code 1</p>
  
  <p>I've already tried to create my keys on build.gradle like this:</p>
  
  <pre><code>buildTypes {
          release {
              // TODO: Add your own signing config for the release build.
              // Signing with the debug keys for now, so `flutter run --release` works.
              signingConfig signingConfigs.release
          }
      }
  </code></pre>
  
  <p>and like this:</p>
  
  <pre><code>buildTypes {
          release {
              // TODO: Add your own signing config for the release build.
              // Signing with the debug keys for now, so `flutter run --release` works.
              signingConfig signingConfigs.debug
          }
      }
  </code></pre>
  
  <p>but I've got the same error to build apk.
  The official documentation seems to be wrong.
  How to create apk on VS Code?</p>