UHF-9620: Purge assets from varnish cache

[tuutti]

How to install

• composer require drupal/helfi_proxy:dev-UHF-9620
• Copy settings.php and docker-compose.yml files from UHF-9620: Add assets to Varnish cache, new asset purge configuration drupal-helfi-platform#210
• Re(start) your project
• Run database updates drush updb

How to test

• Request any page and check the age header of that page
• Wait for a couple of seconds and refresh the page again and make sure the age header has changed
• Check the age header of any CSS / JS asset on that page and make sure the age returns a non-zero value
• Run drush helfi:post-deploy && drush p:queue-work
• Make sure the age header of CSS / JS assets was reset to zero, but the page's age header did not.
• Make sure CSS url() contains the configured asset path

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.66%. Comparing base (68dd382) to head (a9290c8).

❗ Current head a9290c8 differs from pull request most recent head c747b60. Consider uploading reports for the commit c747b60 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #70      +/-   ##
============================================
+ Coverage     63.36%   68.66%   +5.30%     
  Complexity       82       82              
============================================
  Files            14       14              
  Lines           232      233       +1     
============================================
+ Hits            147      160      +13     
+ Misses           85       73      -12     

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[hyrsky]

I don't think test failure is related to this.

[sonarcloud]

Quality Gate passed

Issues
1 New issue

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud