Docs: update all documentation and add overview

- README: add Frontend section, deploy script, docs links, status
- docs/README.md: new documentation overview (entry points, frontend, deployment)
- docs/EXPLORER_API_ACCESS.md: reference deploy-frontend-to-vmid5000.sh for frontend-only deploy
- docs/INDEX.md: add Frontend & Explorer section, fix Quick Start, Last Updated
- README_DEPLOYMENT: add docs/README, EXPLORER_API_ACCESS, deploy script, deployment guide
- frontend/FRONTEND_REVIEW.md: add post-review update (C1–L4 implemented)

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/README.md

@@ -0,0 +1,56 @@
+# Explorer Monorepo – Documentation
+
+Overview of documentation for the ChainID 138 Explorer (SolaceScanScout).
+
+---
+
+## Entry points
+
+| Doc | Description |
+|-----|-------------|
+| **[INDEX.md](./INDEX.md)** | Full documentation index (bridge, setup, verification, operations) |
+| **[EXPLORER_API_ACCESS.md](./EXPLORER_API_ACCESS.md)** | API access, 502 fix, CSP, frontend deploy for https://explorer.d-bis.org |
+| **[../README.md](../README.md)** | Project README: quick start, frontend, architecture, config |
+
+---
+
+## Frontend
+
+| Doc | Description |
+|-----|-------------|
+| **[../frontend/FRONTEND_REVIEW.md](../frontend/FRONTEND_REVIEW.md)** | Frontend code review (SPA + React) |
+| **[../frontend/FRONTEND_TASKS_AND_REVIEW.md](../frontend/FRONTEND_TASKS_AND_REVIEW.md)** | Task list C1–L4 and detail review |
+
+**Deploy the live SPA (VMID 5000):**
+
+```bash
+./scripts/deploy-frontend-to-vmid5000.sh
+```
+
+**Full fix (Blockscout + nginx + frontend):**
+
+```bash
+./scripts/complete-explorer-api-access.sh
+```
+
+---
+
+## Deployment
+
+| Doc | Description |
+|-----|-------------|
+| **[../README_DEPLOYMENT.md](../README_DEPLOYMENT.md)** | Deployment quick reference |
+| **[../deployment/DEPLOYMENT_GUIDE.md](../deployment/DEPLOYMENT_GUIDE.md)** | Full LXC + Nginx + Cloudflare deployment guide |
+| **[../QUICKSTART.md](../QUICKSTART.md)** | Quick start (deps, infra, dev services) |
+
+---
+
+## Other
+
+- **Bridge / WETH:** See [INDEX.md](./INDEX.md) for bridge setup, verification, and operations.
+- **Specs:** [specs/](./specs/) for infrastructure and multichain specs.
+- **CCIP, Blockscout, etc.:** See files in this directory and the repo root.
+
+---
+
+*Last updated: 2025-02-09*