Request problem occurred when customizing OCCT-WASM

[sunlin0oo]

Hi,everyone!
When I looked at this document, I got the following error when doing Docker compilation,But I don't know how to solve it.
ports:INFO: retrieving port: freetype from https://github.com/emscripten-ports/FreeType/archive/version_1.zip
Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/urllib3/connection.py", line 203, in _new_conn
sock = connection.create_connection(
File "/usr/local/lib/python3.8/dist-packages/urllib3/util/connection.py", line 85, in create_connection
raise err
File "/usr/local/lib/python3.8/dist-packages/urllib3/util/connection.py", line 73, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/urllib3/connectionpool.py", line 790, in urlopen
response = self._make_request(
File "/usr/local/lib/python3.8/dist-packages/urllib3/connectionpool.py", line 491, in _make_request
raise new_e
File "/usr/local/lib/python3.8/dist-packages/urllib3/connectionpool.py", line 467, in _make_request
self._validate_conn(conn)
File "/usr/local/lib/python3.8/dist-packages/urllib3/connectionpool.py", line 1096, in _validate_conn
conn.connect()
File "/usr/local/lib/python3.8/dist-packages/urllib3/connection.py", line 611, in connect
self.sock = sock = self._new_conn()
File "/usr/local/lib/python3.8/dist-packages/urllib3/connection.py", line 218, in _new_conn
raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f4eb8b83fa0>: Failed to establish a new connection: [Errno 111] Connection refused

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/requests/adapters.py", line 486, in send
resp = conn.urlopen(
File "/usr/local/lib/python3.8/dist-packages/urllib3/connectionpool.py", line 844, in urlopen
retries = retries.increment(
File "/usr/local/lib/python3.8/dist-packages/urllib3/util/retry.py", line 515, in increment
raise MaxRetryError(_pool, url, reason) from reason # type: ignore[arg-type]
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='github.com', port=443): Max retries exceeded with url: /emscripten-ports/FreeType/archive/version_1.zip (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f4eb8b83fa0>: Failed to establish a new connection: [Errno 111] Connection refused'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/emsdk/upstream/emscripten/emcc.py", line 4084, in
sys.exit(main(sys.argv))
File "/usr/lib/python3.8/contextlib.py", line 75, in inner
return func(*args, **kwds)
File "/emsdk/upstream/emscripten/emcc.py", line 4077, in main
ret = run(args)
File "/emsdk/upstream/emscripten/emcc.py", line 1194, in run
phase_calculate_system_libraries(state, linker_arguments, linker_inputs, newargs)
File "/usr/lib/python3.8/contextlib.py", line 75, in inner
return func(*args, **kwds)
File "/emsdk/upstream/emscripten/emcc.py", line 2795, in phase_calculate_system_libraries
extra_files_to_link += ports.get_libs(settings)
File "/emsdk/upstream/emscripten/tools/ports/init.py", line 342, in get_libs
ret += [f for f in port.get(Ports, settings, shared) if not f.endswith('.txt')]
File "/emsdk/upstream/emscripten/tools/ports/freetype.py", line 19, in get
ports.fetch_project('freetype', 'https://github.com/emscripten-ports/FreeType/archive/' + TAG + '.zip', 'FreeType-' + TAG, sha512hash=HASH)
File "/emsdk/upstream/emscripten/tools/ports/init.py", line 258, in fetch_project
retrieve()
File "/emsdk/upstream/emscripten/tools/ports/init.py", line 213, in retrieve
response = requests.get(url,verify=False)
File "/usr/local/lib/python3.8/dist-packages/requests/api.py", line 73, in get
return request("get", url, params=params, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/requests/api.py", line 59, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/requests/sessions.py", line 589, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python3.8/dist-packages/requests/sessions.py", line 703, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/requests/adapters.py", line 519, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='github.com', port=443): Max retries exceeded with url: /emscripten-ports/FreeType/archive/version_1.zip (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f4eb8b83fa0>: Failed to establish a new connection: [Errno 111] Connection refused'))
Traceback (most recent call last):
File "/opencascade.js/src/buildFromYaml.py", line 129, in
runBuild(buildConfig["mainBuild"])
File "/opencascade.js/src/buildFromYaml.py", line 120, in runBuild
subprocess.check_call([
File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
raise CalledProcessError(retcode, cmd)
Thanks for your reply!

[sunlin0oo]

What I found is that I can't connect to Github in Docker, how should I handle this situation?