Manual Approval in GitHub Actions

Before deploying to an environment with GitHub actions, you may need to implement a manual approval, especially in production environment. If it is a infrastructure deployment pipeline you may need even implement approvals for development environments to avoid unstable environments due to infrastructure failures. You may want to check what happens if you deploy Bicep or Terraform script, and then approve the execution to the target environment. Let's try to understand how to implement a manual approval step in GitHub actions