APM-6214 Replace apimocker with express

[sophieclayton12-nhs]

Summary

Replacing apimocker which is no longer maintained with express, which is consistent with some of our other sandboxes
Also upgraded node version from 12 -> 22

Reviews Required

• Dev
• Test
• Tech Author
• Product Owner

Review Checklist

ℹ️ This section is to be filled in by the reviewer.

• I have reviewed the changes in this PR and they fill all or part of the acceptance criteria of the ticket, and the code is in a mergeable state.
• If there were infrastructure, operational, or build changes, I have made sure there is sufficient evidence that the changes will work.
• I have ensured the changelog has been updated by the submitter, if necessary.

[github-actions]

This branch is work on a ticket in the NHS Digital AMB JIRA Project. Here's a handy link to the ticket:

APM-6214

[github-actions]

This branch is working on a ticket to deploy to internal-portal. Here's a handy link to the specification:

APM-6214-replace-apimocker specification

[github-actions]

This branch is work on a ticket in the NHS Digital AMB JIRA Project. Here's a handy link to the ticket:

APM-6214

[github-actions]

This branch is working on a ticket to deploy to internal-portal. Here's a handy link to the specification:

APM-6214-replace-apimocker specification

[github-actions]

This branch is work on a ticket in the NHS Digital AMB JIRA Project. Here's a handy link to the ticket:

APM-6214

[github-actions]

This branch is working on a ticket to deploy to internal-portal. Here's a handy link to the specification:

APM-6214-replace-apimocker specification

[github-actions]

This branch is work on a ticket in the NHS Digital AMB JIRA Project. Here's a handy link to the ticket:

APM-6214

[github-actions]

This branch is working on a ticket to deploy to internal-portal. Here's a handy link to the specification:

APM-6214-replace-apimocker specification

[github-actions]

This branch is work on a ticket in the NHS Digital AMB JIRA Project. Here's a handy link to the ticket:

APM-6214

[github-actions]

This branch is working on a ticket to deploy to internal-portal. Here's a handy link to the specification:

APM-6214-replace-apimocker specification

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[NautiyalVikas1]

approved