Add hello world REST endpoint

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Summary

• Adds a minimal Node.js Express server with a GET /hello endpoint returning {"message": "Hello, World!"}
• Initializes package.json with Express dependency and a start script
• Server listens on PORT env var (default 3000)

Test plan

• npm start launches the server
• curl http://localhost:3000/hello returns {"message":"Hello, World!"}

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Issues

2 potential issues found:

• No .gitignore is included, so a future npm install followed by git add . will commit the entire node_modules directory (hundreds of files) into the repository.
• The test script in package.json is the default npm placeholder (echo "Error: no test specified" && exit 1), so npm test will always fail. Consider adding a real test or removing the misleading script.

Summary

This PR adds a minimal Express.js (v5) REST API server with a single GET /hello endpoint to a repository that previously contained only static image assets (logos in .gif, .png, .svg formats).

• Adds index.js with an Express server listening on PORT (default 3000) serving GET /hello returning { message: "Hello, World!" }
• Adds package.json with Express ^5.2.1 dependency and a start script
• Adds package-lock.json lockfile for the dependency tree

CI Checks

Waiting for CI checks...

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Missing .gitignore: This PR adds package.json and package-lock.json but no .gitignore. Without one, running npm install and then git add . will commit the entire node_modules directory into the repo. Add a .gitignore with at least node_modules/ to prevent this.