sock request to docker

[kootenpv]

I wonder how I can make the socket work locally to docker:

import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("www.httpbin.org", 80))
http=b"""GET /get HTTP/1.1
Host: www.httpbin.org
User-Agent: python-requests/2.27.1
Accept-Encoding: gzip, deflate, br
Accept: */*
Connection: keep-alive

"""
sock.sendall(http)
sock.recv(4096)

this works for the hosted HTTP version

but when I attempt it locally:

import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("localhost", 8001))
http=b"""GET /get HTTP/1.1
Host: localhost:8001
User-Agent: python-requests/2.27.1
Accept-Encoding: gzip, deflate, br
Accept: */*
Connection: keep-alive

"""
sock.sendall(http)
sock.recv(4096)

it doesn't work (gives back b"")

any idea how come?

docker info:

CONTAINER ID   IMAGE                  COMMAND                  CREATED          STATUS                      PORTS                                   NAMES
a807e21c55f7   kennethreitz/httpbin   "gunicorn -b 0.0.0.0…"   51 minutes ago   Up 51 minutes               0.0.0.0:8001->80/tcp, :::8001->80/tcp   exciting_dewdney