Merge Azure App Service Slots into same service

[rafaelmiranda]

Hi,

I'm integrating Dynatrace with Azure App Service and works ok except when I have multiple service slots.
I have an app MyApp and each slot have different application ids and consequently are being shown as different services:

- MyApp

- myapp__b123

I'm using service detection rules to improve detection and I'm able to remove the suffix:

"applicationId": {
    "enableIdContributor": true,
    "serviceIdContributor": {
        "contributionType": "TransformValue",
        "transformations": [
            {
                "transformationType": "SPLIT_SELECT",
                "splitDelimiter": "__",
                "selectIndex": 1
            }
        ]
    }
},

But I'm still struggling with the casing. I wish I could use a case insensitive rule or at least override the ApplicationId with a environment variable.

I tried using DT_APPLICATIONID but apparently it only works when the service does not have an existing application id.