Build issue with licences not being accepted

[stephangrobler]

I am having an issue on gitlab ci where the following error is being given when using this image:

WARNING: The specified Android SDK Build Tools version (25.0.2) is ignored, as it is below the minimum supported version (26.0.2) for Android Gradle Plugin 3.0.1.
Android SDK Build Tools 26.0.2 will be used.
To suppress this warning, remove "buildToolsVersion '25.0.2'" from your build.gradle file, as each version of the Android Gradle Plugin now has a default version of the build tools.
File /root/.android/repositories.cfg could not be loaded.
Checking the license for package Android SDK Build-Tools 26.0.2 in /opt/android-sdk-linux/licenses
Warning: License for package Android SDK Build-Tools 26.0.2 not accepted.
Checking the license for package Android SDK Platform 27 in /opt/android-sdk-linux/licenses
Warning: License for package Android SDK Platform 27 not accepted.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':CordovaLib'.
> You have not accepted the license agreements of the following SDK components:
  [Android SDK Platform 27, Android SDK Build-Tools 26.0.2].
  Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.
  Alternatively, to learn how to transfer the license agreements from one workstation to another, go to http://d.android.com/r/studio-ui/export-licenses.html

Is there a way to lock in the Android Gradle version?

Any advice would be great!