Fix CORS test on github actions

[jbrichau]

After searching for over a day to debug and understand... it turns out changing the port from 8084 to 8888 was what was needed to make this work on Github CI....

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (e440868) 48.35% compared to head (24d01c4) 48.42%.

❗ Current head 24d01c4 differs from pull request most recent head 5cd2159. Consider uploading reports for the commit 5cd2159 to get more accurate results

Files	Patch %	Lines
...rFunctionalTestCase.class/instance/clickRestart.st	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1400      +/-   ##
==========================================
+ Coverage   48.35%   48.42%   +0.06%     
==========================================
  Files        9159     9161       +2     
  Lines       82123    82141      +18     
==========================================
+ Hits        39711    39774      +63     
+ Misses      42412    42367      -45     

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