feat: enable 1-minute zero-config onboarding and move advanced docs t…

[Kshitizjain11]

Overview

This PR improves the first-run experience to a true 1-minute onboarding and moves advanced setup details out of the main README. New users can run the project with defaults immediately, while customization docs remain available in the docs/ folder.

Closes #141 — Improve first-run onboarding experience

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Motivation

The maintainer issue requested:

• A faster "Get It Running" path
• Default config usage (CONTRIB data) to avoid manual setup
• A shorter quickstart (3 lines or less)
• Moving confusing sections (config reference, local development, REST API) to docs

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Changes

File	What changed
README.md	Replaced 5-minute setup with a 3-command quickstart using built-in demo defaults; removed advanced setup noise
getting-started.md	Added organized advanced setup content: config reference, local dev workflow, REST API pointer
docs/rest-api.md	REST API docs moved here; root REST-API.md removed to avoid duplicate entry points
app.js	Auto-creates config.json from config-example.json when missing; demo-safe defaults when .env is absent
refresh.js	Auto-creates config.json when missing; repairs missing/empty/invalid data.json and log.json instead of crashing
API.js	Makes AUTH_TOKEN optional — authorization header only added when present, enabling no-.env demo runs
AGENTS.md, GEMINI.md	Updated references to match new docs locations and startup behavior

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Tests

npm run lint          # passes
npm test              # passes (2/2)
NODE_OPTIONS=--openssl-legacy-provider npm run build   # passes (non-blocking webpack size warnings)

Manual smoke test — all endpoints pass:

curl http://localhost:62050/config
curl http://localhost:62050/data
curl http://localhost:62050/stats
curl "http://localhost:62050/rank?parameter=mergedprs"

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How to verify

npm run add
npm run lint
npm test
NODE_OPTIONS=--openssl-legacy-provider npm run build
npm run serve

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Checklist

• Read and understood all changed code paths
• Lint passes
• Tests pass
• Build passes
• Manual backend smoke test passes
• Scope matches maintainer issue requirements

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AI-assisted contribution disclosure: Mostly AI-generated.

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