Add deployment configurations for Render and Vercel

backend/Procfile

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+web: gunicorn -w 4 -b 0.0.0.0:$PORT run:app

frontend/vercel.json

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+{
+  "rewrites": [
+    {
+      "source": "/api/(.*)",
+      "destination": "https://aipcss-backend.onrender.com/api/$1"
+    },
+    {
+      "source": "/socket.io/(.*)",
+      "destination": "https://aipcss-backend.onrender.com/socket.io/$1"
+    },
+    {
+      "source": "/(.*)",
+      "destination": "/index.html"
+    }
+  ]
+}

render.yaml

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+services:
+  - type: web
+    name: aipcss-backend
+    env: python
+    rootDir: backend
+    buildCommand: pip install -r requirements.txt
+    startCommand: gunicorn -w 4 -b 0.0.0.0:$PORT run:app
+    envVars:
+      - key: FLASK_ENV
+        value: production
+      - key: SECRET_KEY
+        generateValue: true
+      - key: JWT_SECRET_KEY
+        generateValue: true
+      - key: DATABASE_URL
+        fromDatabase:
+          name: aipcss-db
+          property: connectionString
+      - key: CORS_ORIGINS
+        value: "*"
+
+  - type: psql
+    name: aipcss-db
+    plan: free