Update README.md

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Project Description
Apex Platform Engine (lucky-river-ad40) is a multi-tenant serverless runtime platform built on Cloudflare Workers. It provides an enterprise-grade execution environment that isolates administrative operations, serves static frontend assets, and executes dynamic customer workloads.
Key Architectural Components

• Edge Gateway (src/index.ts): Acts as the central entry point.
  • Administrative Operations (/admin): Restricted area requiring an X-Identity-Token header for access. Rejects requests from internal CGNAT/Tailscale IP ranges (100.64.x.x and 100.127.x.x). Contains the /admin/api/deploy endpoint for deploying script modules to customer sandboxes via the Cloudflare API.
  • Dynamic Workspaces (/app/:tenantId): Routes traffic to tenant sandboxes via Cloudflare Workers for Platforms (CUSTOMER_COMPUTE dispatch namespace), resolving script bindings via key-value lookup (AUTH_KV).
  • Public Marketing Frontend: Automatically offloads static site requests to assets located in the ./website directory via Cloudflare Workers Static Assets (ASSETS binding).
• Egress Security Guard (src/outbound.ts): Filters egress traffic by blocking calls to internal domains (*.internal, localhost) and stripping platform headers (X-Identity-Token) prior to external dispatch.
• Testing Engine (src/index.test.ts): Vitest isolation engine tests validating edge security rules, drop behaviors for unauthenticated admin calls, and IP spoofing prevention.
• Automated CI/CD (.github/workflows/deploy.yml): GitHub Actions workflow that executes TypeScript typechecks (tsc --noEmit), runs Vitest test suites, and deploys directly to Cloudflare via cloudflare/wrangler-action@v3.
  Pull Request & Git Deployment Strategy
  To merge, test, and deploy these platform updates into your GitHub repository, execute the following commands:

1. Commit Local Blueprint & Apply Configuration

Initialize local repository if not already established

git init

Stage all updated file paths

git add .
git commit -m "feat: complete apex platform engine edge compute architecture"

2. Branch Cleanup & PR Deployment Workflow

Switch to main branch

git branch -M main

Link remote GitHub repository

git remote add origin https://github.com/YOUR_ORGANIZATION/apex-platform-engine.git

Clean up stale temporary branches (e.g., xiaunknown116-del) locally and remotely

git branch -D xiaunknown116-del 2>/dev/null
git push origin --delete xiaunknown116-del 2>/dev/null

Push updates to main to trigger GitHub Action CI/CD deployment

git push -u origin main

3. Continuous Integration Matrix Verification
   Upon pushing to main, GitHub Actions will execute .github/workflows/deploy.yml:

• Typechecking: npx tsc --noEmit verifies strict TypeScript types.
• Unit Tests: npm run test executes src/index.test.ts to confirm security gates.
• Cloudflare Deployment: cloudflare/wrangler-action@v3 publishes lucky-river-ad40 live using CLOUDFLARE_API_TOKEN and CLOUDFLARE_ACCOUNT_ID.