fix: set COOP to allow popups for GSI login
The Cross-Origin-Opener-Policy for DJ4 is same-origin by default (wasn't even a thing in DJ3).
This needed changing to allow the Google SignIn popup to be used.
Fix for #39 (closed)
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The Cross-Origin-Opener-Policy for DJ4 is same-origin by default (wasn't even a thing in DJ3).
This needed changing to allow the Google SignIn popup to be used.
Fix for #39 (closed)