initial fastapi files

Author: AchiraNadeeshan

backend/api/index.py

@@ -0,0 +1,12 @@
+from fastapi import FastAPI
+from fastapi.responses import JSONResponse
+from mangum import Mangum
+
+app = FastAPI()
+
+@app.get("/")
+async def root():
+    return {"message": "Hello from FastAPI on Vercel!"}
+
+# Required for Vercel
+handler = Mangum(app)