fix(errorHandler): application errors would result in a 200 response

[10xLaCroixDrinker]

Description

Set HTTP status code to 500 in application error handler

Motivation and Context

Application errors were causing HTTP 200 responses

How Has This Been Tested?

Triggered an application error caused by bug fixed in #1242 validated that HTTP status of error page was 200 before change and 500 after

Note: integration tests will fail until #1242 is merged

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update
• Security update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• These changes should be applied to a maintenance branch.
• This change requires cross browser checks.
• Performance tests should be ran against the server prior to merging.
• This change impacts caching for client browsers.
• This change impacts HTTP headers.
• This change adds additional environment variable requirements for One App users.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using One App?

Correct HTTP status of application errors

[github-actions]

Size Change: 0 B

Total Size: 712 kB

ℹ️ View Unchanged

Filename	Size
./build/app/app.js	164 kB
./build/app/app~vendors.js	411 kB
./build/app/runtime.js	7.07 kB
./build/app/service-worker-client.js	7.25 kB
./build/app/vendors.js	123 kB

_{compressed-size-action}

[Matthew-Mallimo]

Does the browser still display the content delivered when its a 500 response?

[10xLaCroixDrinker]

Does the browser still display the content delivered when its a 500 response?

Yes