add python project and remove express projec

fastapi-python/.gitignore

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+__pycache__/

fastapi-python/README.md

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+# Get started
+
+```sh
+
+fastapi dev main.py
+```

fastapi-python/main.py

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+from typing import Union
+
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+class Transfer(BaseModel):
+    amount: int
+    sender: int
+    receiver: int
+
+app = FastAPI()
+
+accounts = {
+    '1': {'amount': 1000},
+    '2': {'amount': 1000},
+}
+
+@app.post("/transfer")
+def transfer(transfer: Transfer):
+    amount = transfer.amount
+    sender = transfer.sender
+    receiver = transfer.receive
+
+    if amount <= 0:
+        return {"error": "Amount must be greater than 0"}
+
+    print(f"transfer {amount} from {sender} to {receiver}")
+    
+    return {"amount": amount, "sender": sender, "receiver": receiver}