Initial commit: Arb Pulse monolith with CI and optional Fly deploy.

Real-time BTC cross-exchange arbitrage detection (Kraken, Bybit, OKX, Binance)
with React dashboard, GitHub Actions CI, and documented Fly.io deploy workflow.

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

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+  pull_request:
+    branches:
+      - main
+      - dev
+
+jobs:
+  quality:
+    name: quality
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+          cache-dependency-path: |
+            package-lock.json
+            web/package-lock.json
+
+      - name: Install dependencies (root)
+        run: npm ci
+
+      - name: Install dependencies (web)
+        run: npm --prefix web ci
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Test
+        run: npm test
+
+      - name: Build
+        run: npm run build

.github/workflows/fly-deploy.yml

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+# Optional Fly.io deploy — manual only. Production deploy is on Render.
+# See https://fly.io/docs/app-guides/continuous-deployment-with-github-actions/
+# Requires FLY_API_TOKEN secret. Docs: .cursor/rules/fly-deploy.mdc
+
+name: Fly Deploy
+on:
+  workflow_dispatch:
+jobs:
+  deploy:
+    name: Deploy app
+    runs-on: ubuntu-latest
+    concurrency: deploy-group    # optional: ensure only one action runs at a time
+    steps:
+      - uses: actions/checkout@v4
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+      - run: flyctl deploy --remote-only
+        env:
+          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}