Setting ASPNETCORE_ENVIRONMENT variables system wide for BLUE GREEN setup

Hi,

we have a number of environments (CI, QA, STAGING, BLUE, GREEN) where we have set the ASPNETCORE_ENVIRONMENT variable for the entire environment at the machine level.

this is set in the applicationHost.config in the system.webServer area as shown below.

        <aspNetCore>
            <environmentVariables>
                <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="DEV" />
                <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="DEV" lockItem="true" />
            </environmentVariables>
        </aspNetCore>

However in our BLUE GREEN environments, a set of webservers might be for TEST and then another is PRODUCTION and vice versa.

I know we can do this in the web.configs for each app but was hoping we can do this machine wide like we did above.

is there a way to set these values programatically for the entire webserver? Thanks in advance

 
            <environmentVariables>
                <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="RC" />
                <envi