update analytics (via #1994)

Author: baev

Analytics.md

@@ -10,24 +10,6 @@ communication with its users nor time resources to ask directly for
 their feedback. As result, we now use anonymous aggregate user 
 analytics to help us understand how Allure Report is being used.
 
-### What?
-
-Allure's analytics record some shared information for
-every event:
-
-- The Google Analytics version i.e. `1` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#v)
-- The Allure report analytics tracking ID e.g. `UA-88115679-3` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#tid)
-- The Allure report version e.g. `2.2.1` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#av)
-- The type of CI system used e.g. `Jenkins` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#cd_)
-- The Google Analytics anonymous IP setting is enabled i.e. `1` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#aip)
-- The count of test results e.g `21` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#cm_)
-- The count of plugins used e.g. `11` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#cm_)
-- The test framework used e.g. `TestNG` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#cm_)
-- The language used e.g. `Java` (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#cm_)
-- The Allure report analytics hit type is event (https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters#t)
-
-With the recorded information, it is not possible for us to match any particular real user with the anonymized user ID. 
-
 ### When/Where?
 
 Allure's analytics are sent throughout Allure report's plugins to Google Analytics over HTTPS.

allure-generator/src/main/resources/tpl/index.html.ftl

@@ -25,5 +25,12 @@
     <script src="plugins/${plugin.id}/${jsFile}"></script>
     </#list>
 </#list>
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-FVWC4GKEYS"></script>
+<script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+    gtag('config', 'G-FVWC4GKEYS');
+</script>
 </body>
 </html>