Add vercel support?

.vercelignore

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+.git
+.gitignore
+README.md
+screenshots/
+docker-compose*.yaml
+Dockerfile
+.env.local
+.env.*.local

api/index.py

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+import sys
+import os
+
+# Add app directory to path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'app'))
+
+from portable import app
+
+# Export for Vercel

vercel.json

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+{
+  "version": 2,
+  "buildCommand": "pip install -r requirements.txt",
+  "env": {
+    "PYTHONUNBUFFERED": "1"
+  },
+  "functions": {
+    "api/index.py": {
+      "runtime": "python3.12",
+      "memory": 3008,
+      "maxDuration": 60
+    }
+  },
+  "routes": [
+    {
+      "src": "/(.*)",
+      "dest": "/api/index.py"
+    }
+  ]
+}