Create REST service for layout management

[pling-scottlogic]

Background

As part of the layout management directive, we want to create a backend service to handle remotely saved layouts.

Work Required

• Create a backend service to act as a layout management server with Java and Spring Boot
  • Define an API on the service with the following endpoints:
    • GET for loading saved layouts
    • POST for saving new layouts
    • PUT for updating existing layouts
    • DELETE for deleting layout
• Set up an in-memory H2 database for persisting layouts and metadata
• Create a service and repository layer to connect the API to the database
• • API contract using openAPI (Good to have. Timebox: 0.5 day)
• Add README: include steps to set up Java environment (see what is already covered by steps for setting up Scala)

[cfisher-scottlogic]

Check that unit & integration tests are running in the pipeline by writing a failing test. If running, cool. If not running, create a new ticket to set this up in the pipeline.

[pling-scottlogic]

Reminder that we will need another resource for application layouts, as mentioned here. Probably best to raise another ticket for that to avoid scope creep here.

[cfisher-scottlogic]

• Add README: include steps to set up Java environment (see what is already covered by steps for setting up Scala)

I've striked this through as I've created a separate ticket for it (#83), as I was likely to forget as part of this ticket and we can also encompass clientside documentation in that ticket.