Discuss the best practice to support different environment

Hi community,

I notice that, almost all templates don't support other environment than Global Azure. However, Azure has several different environments: `Azure`, `AzureChina`, `AzureUSGovernment`, `AzureGermanCloud`. In each environment, some endpoints are different. Reference: https://github.com/Azure/azure-sdk-for-node/blob/master/runtime/ms-rest-azure/lib/azureEnvironment.js

**Does community has an advice or best practice about how to deal with these different environments?**

This is what I do: [bosh-setup](https://github.com/Azure/azure-quickstart-templates/blob/master/bosh-setup/azuredeploy.json).
In `bosh-setup`, we use a parameter `environment` for `Azure` and `AzureChinaCloud`. It works fine with Azure CLI.
But for the Portal experience, we need to add a button to deploy the template. We are working on it, so that we'll have two buttons, one for Azure, one for AzureChinaCloud. Any suggestions?

Start with the referenced runtime-ms-rest-azure/lib/azureEnvironment.js and the bosh-setup/azuredeploy.json example. Compare how the environment parameter works with Azure CLI and how Portal deployment buttons would need to cover Azure and AzureChinaCloud. Done means reaching and documenting a clear recommendation for supporting the listed Azure environments.

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