Flask Python

import base64

from flask import Flask, Response

GIF = base64.b64decode("R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==")

app = Flask(__name__)


@app.get("/pixel.gif")
def pixel():
    return Response(GIF, mimetype="image/gif", headers={"Cache-Control": "no-store"})