Implement greeting endpoints and remove outdated requirements file

app.py

@@ -5,3 +5,8 @@ app = FastAPI()
 @app.get("/")
 def greet_json():
     return {"Hello": "World!"}
+
+
+@app.get("/greet/{name}")
+def greet_name(name: str):
+    return {"Hello": name}

requirements.tst

@@ -1,2 +0,0 @@
-fastapi
-uvicorn[standard]