[#14346] Redirect with back-end configured frontendUrl

[TobyCyan]

Fixes #14346

Outline of Solution

• Step 2 of the issue.

[samuelfangjw]

• This PR also sets the E2E and Axe CI jobs to redirect to port 8080 for frontend URL.

@TobyCyan, help to do a check on this. Why is there a need to set a different frontend and backend url for tests? Can we just follow the actual backend configuration instead? Keep in mind the e2e suite only works properly in dev env at the moment and there are no plans to have it support running against a live server in the future.

[TobyCyan]

• This PR also sets the E2E and Axe CI jobs to redirect to port 8080 for frontend URL.

@TobyCyan, help to do a check on this. Why is there a need to set a different frontend and backend url for tests? Can we just follow the actual backend configuration instead? Keep in mind the e2e suite only works properly in dev env at the moment and there are no plans to have it support running against a live server in the future.

There is an architectural rule that says the E2E package shouldn't reference Config properties. I suppose it's to keep between test-only configs independent from app configs. However, I think we could have BaseE2ETestCase reference the Config URLs since the servlets' redirection behavior is determined by Config.