fix: apply getPath to PUBLIC_PATH to allow use with CDN

[dcoa]

Description

When ORA is configured to be used with CDN the locationId is unresolved because PUBLIC_PATH is not fully matched.

The API returns 404 because the location has /ora-grading/.

How to replicate

1. Set the public path to a URL, e.g. ENV PUBLIC_PATH='http://apps.local.edly.io/ora-grading/'
2. Load the ORA-Grading MFE
3. Check the request.

[OPTIONAL] Proposal

I was thinking that it might be better to resolve this on the frontend platform, I mean, use getPath to parse the PUBLIC_PATH in the config class, in this way all the MFEs that use that variable don't need to use parse it.

What do you think @arbrandes (as reviewer on the fronted platform implementation)?

[openedx-webhooks]

Thanks for the pull request, @dcoa!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (4581cf8) to head (7cf788f).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #346   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files          109       109           
  Lines         1085      1086    +1     
  Branches       166       166           
=========================================
+ Hits          1085      1086    +1     

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[dcoa]

Hi @arbrandes, have you had time to check this small fix?

C.C. @mphilbrick211

[MaferMazu]

Thanks for this PR @dcoa. This change looks good to me ✨

Screenshots

I tried this PR and here is the before and after using your instructions to test:

Before

After

[MaferMazu]

@arbrandes, could you help us with a review?

[dcoa]

@CodeWithEmad, could you please have a look in this PR?