Question: can I add a custom deployment step to transform a file

My typical method of configuring an angular app is to NOT bake in deployment configuration into the app. Instead I have the azure DevOps pipeline perform parameter substitution on a file in the published `dist` folder (see [File Transform task](https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/file-transform?view=azure-devops))

Is there a way to customise the deployment pipeline in any way (ideally for an azure devops pipeline)?

Thanks