Refactor code structure for improved readability and maintainability

Q1/README.md

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+# API + Health Monitor + Dashboard (for ghaymah.systems)
+
+This is your uploaded project (`server.js`, `monitor.sh`, `index.html`,
+`Dockerfile`) with three functional bugs fixed and a couple of production
+hardening tweaks. Nothing about your architecture changed.
+
+## What was wrong and what I changed
+
+1. **`index.html` was fetching the wrong URL.**
+   `const API_URL = "";` then `fetch(API_URL)` calls the *current page*
+   (`/`), not `/health` — so it was trying to `JSON.parse()` an HTML page
+   and always fell into the `catch` block ("Offline"), even when the API
+   was healthy. Fixed to `fetch('/health')`.
+
+2. **`server.js` had no route serving `index.html`.**
+   The dashboard needs to be reachable somewhere. I added
+   `express.static('public')` and moved `index.html` into `public/`, so the
+   dashboard is served at `/` and the plain-text welcome message moved to
+   `/api` so the two don't collide.
+
+3. **`monitor.sh` referenced `$response_time`, which was never set** — the
+   response-time column was always empty. Fixed by measuring it directly
+   with `curl -w "%{time_total}"`. Also added a fallback JSON parser for
+   when `jq` isn't installed, and an optional CSV log file.
+
+4. **Dockerfile ran `npm init -y && npm install` on every build**, with no
+   lockfile/manifest — slow, non-reproducible, and re-downloads
+   dependencies on every rebuild even if nothing changed. Added a real
+   `package.json` and split `COPY package.json` from `COPY server.js` so
+   Docker caches the `npm install` layer. Also switched
+   `node:20-alpine3.16` (an older, unsupported Alpine point release) to
+   `node:20-alpine` (current supported tag).
+
+## Files
+
+```
+.
+├── Dockerfile
+├── package.json
+├── server.js
+├── public/
+│   └── index.html      ← dashboard, served at /
+└── monitor.sh           ← external checker, run it against the deployed URL
+```
+
+## Run locally
+
+```bash
+npm install
+npm start
+# open http://localhost:3000        -> dashboard
+# open http://localhost:3000/health -> raw JSON
+```
+
+In another terminal, point the monitor at it:
+
+```bash
+chmod +x monitor.sh
+./monitor.sh http://localhost:3000 30
+```
+
+## Build & run with Docker
+
+```bash
+docker build -t api-health-demo .
+docker run -d -p 3000:3000 --name api-health-demo api-health-demo
+```
+
+## `/health` response shape
+
+```json
+{
+  "status": "Online",
+  "uptime_seconds": 42,
+  "request_count": 17,
+  "response_time_ms": 3,
+  "timestamp": "2026-07-27T20:10:00.000Z"
+}
+```
+
+## Deploy to ghaymah.systems
+
+See `DEPLOY_GHAYMAH.md` for the step-by-step (build → push → create
+service → set port 3000 → point `monitor.sh` at the live URL).