Initial commit: FastAPI Hello World API

main.py

@@ -0,0 +1,8 @@
+from fastapi import FastAPI, Request
+
+app = FastAPI()
+
+@app.get("/")
+async def read_root(request: Request):
+    client_host = request.client.host
+    return {"message": "ハローワールド！！", "client_ip": client_host}