feat(model-ad): add Java-Spring API server

[tschaffter]

[!IMPORTANT]
Do not merge this until #2705 is merged.

Description

Add a project for MODEL-AD REST API developed with Java-Spring and generated with the OpenAPI Generator.

The new project model-ad-api has been created by adapting the project openchallenges-challenge-service.

Features:

• Modern Tech Stack: This project is configured for Java 17 and Spring Boot 2.7.8, Spring Cloud 3.1.4, and Spring Data 2.7.7.
• Code Formatting: Using Spotless ensures consistent code formatting, improving readability and maintainability.
• Testing: JUnit 5 for unit and integration tests along with JaCoCo for code coverage shows a focus on code quality and testability.
• Static Code Analysis (upcoming): Future integration of Sonar will enable detection of bugs, code smells, and security vulnerabilities along with tracking code coverage.
• Containerization and Security: Containerizing the REST API with Docker allows for easy deployment and potential for scaling. Trivy helps identify security vulnerabilities in the container image.
• Image Publishing: Publishing the image to GHCR (GitHub Container Registry) provides a secure and reliable way to store and access the image.

Changelog

• add the project model-ad-api
• add an implementation for the single endpoint of the API (static response)

Preview

Start the REST API development server

nx serve model-ad-api

Open your browser and navigate to localhost:8080 to access the Swagger UI of the API.

Fetch a page of genes from Swagger UI:

Build the image of the REST API

nx build-image model-ad-api

Start the REST API server (Docker container)

nx serve-detach model-ad-api

Open your browser and navigate to localhost:8080 to access the Swagger UI of the API.

[tschaffter]

@hallieswan Let's use the Java-Spring implementation for the sake of the tutorial series.