{
  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/spfx-serve.schema.json",
  "port": 4321,
  "https": true,
  "serveConfigurations": {
    "default": {
      "pageUrl": "https://enter-your-SharePoint-site/_layouts/workbench.aspx",
      "customActions": {
        "38afa8d7-b498-4529-9f99-6279392f9309": {
          "location": "ClientSideExtension.ApplicationCustomizer",
          "properties": {
            "testMessage": "Test message"
          }
        }
      }
    },
    "referenceInjector": {
      "pageUrl": "https://enter-your-SharePoint-site/_layouts/15/viewlsts.aspx",
      "customActions": {
        "38afa8d7-b498-4529-9f99-6279392f9309": {
          "location": "ClientSideExtension.ApplicationCustomizer",
          "properties": {
            "testMessage": "Test message"
          }
        }
      }
    }
  }
}