added FastApi Doc

Docs/Services/FastAPI/02-Simple-Route.md

@@ -0,0 +1,21 @@
+```python
+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/")
+def home_dir():
+    return {"message": "Home Pag"}
+```
+
+```bash
+fastapi dev main.py
+```
+use uvicorn as defualt runner 
+or
+we can run with uvicorn command
+```bash
+uvicorn main:app --reload --host 0.0.0.0 --port 1234
+```
+