LNP-1107: 🏴󠁧󠁢󠁥󠁮󠁧󠁿 serve English content from entrypoint of /en/jsonapi rather than /jsonapi, to match Welsh.

[Eli-TW]

Context

Does this issue have a Jira ticket?

https://dsdmoj.atlassian.net/browse/LNP-1107

If this is an issue, do we have steps to reproduce?

N/A

Intent

What changes are introduced by this PR that correspond to the above card?

Config change to language negotiation for english content.

Would this PR benefit from screenshots?

No

Considerations

Is there any additional information that would help when reviewing this PR?

No

Are there any steps required when merging/deploying this PR?

⚠️ This must be deployed in tandem with front end change ministryofjustice/prisoner-content-hub-frontend#735 and will cause the vast majority of the page cache to become invalid. Therefore a cache warming strategy must be considered and a Service Now outage negotiated.

Checklist

• This PR contains only changes related to the above card
• This deployment has been tested for cache invalidation
• Tests have been added/updated to cover the change
• Documentation has been updated where appropriate
• Tested in Development