add support to send file as data to server using curl/request

[ayoubelmhamdi]

add support to send data like:

fileTMP="$1"
curl -s -F file=@"${fileTMP}" http://127.0.0.1:5500/

-@app.route('/')
+@app.route("/", methods=["GET", "POST"])
-async def index() -> None:
+async def index() -> str:
     """
     Main function
     """
     bot = EdgeGPT.Chatbot(proxy=args.proxy)

+    if request.method == "GET":
+        question = request.args.get("text")
+        print("get")
+    else:
+        file = request.files["file"]
+        text = file.read().decode("utf-8")
+        question = text
+        print("Post reading the file", question)