Migrate to Google Analytics 4 (GA4)

[chalin]

This issue is part of a CNCF-wide effort to upgrade project websites to GA4 since Google has deprecated Universal Analytics (UA). For more details, see:

• Migrate CNCF websites to GA4 cncf/techdocs#108, including reference to a suggested migration process, which we've used to migrate a few CNCF projects already.

Tasks

• From the website data stream (G-60C6Q1ETC1),
  configure cross-domain measurement for the blog.dapr.io domain
• Switch to using the GA4 website ID via gtag.js via head-end hook, since Docsy is too old -
  Use Google Analytics 4 ID #93
• Confirm that the GA4 site tag is receiving events -- tagassistant.google.com was used to confirm
• Connect UA-58468480-2 from GA4 stream
• Confirm that the UA site tag, UA-58468480-2, is still receiving events

Followup

• Can't enable Google Analytics 4 because Docsy version is too old #94

Notes:

• This is the blog subdomain counterpart to Migrate to Google Analytics 4 (GA4) docs#2861.
• The main Dapr-websites issue is Migrate to Google Analytics 4 (GA4) website#71

/cc @caniszczyk @nate-double-u

---

Current website analytics info: UA-149338238-2 registered via old analytics.js library:

<script type="application/javascript">...
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', 'UA-149338238-2', 'auto'); ...
</script>
<script async src='https://www.google-analytics.com/analytics.js'></script>

[chalin]

As is mentioned in the opening comment, UA ID was registered using the analytics.js library, so there is no point in attempting to connect it from the GA4 stream.

[chalin]

All done here!