Publishing of a new release image on Docker Hub fails

[northwestwitch]

Collecting platformdirs<3,>=2.4
  Downloading platformdirs-2.5.2-py3-none-any.whl (14 kB)
Collecting distlib<1,>=0.3.5
  Downloading distlib-0.3.6-py2.py3-none-any.whl (468 kB)
Collecting filelock<4,>=3.4.1
  Downloading filelock-3.8.0-py3-none-any.whl (10 kB)
Installing collected packages: pycparser, urllib3, idna, charset-normalizer, cffi, certifi, zipp, requests, pylev, pastel, msgpack, jeepney, cryptography, crashtest, webencodings, six, SecretStorage, pyparsing, ptyprocess, platformdirs, lockfile, importlib-metadata, filelock, distlib, clikit, cachecontrol, virtualenv, tomlkit, shellingham, requests-toolbelt, poetry-core, pkginfo, pexpect, packaging, keyring, html5lib, cleo, cachy, poetry
Successfully installed SecretStorage-3.3.3 cachecontrol-0.12.11 cachy-0.3.0 certifi-2022.6.15 cffi-1.15.1 charset-normalizer-2.1.1 cleo-0.8.1 clikit-0.6.2 crashtest-0.3.1 cryptography-37.0.4 distlib-0.3.6 filelock-3.8.0 html5lib-1.1 idna-3.3 importlib-metadata-4.12.0 jeepney-0.8.0 keyring-23.8.2 lockfile-0.12.2 msgpack-1.0.4 packaging-20.9 pastel-0.2.1 pexpect-4.8.0 pkginfo-1.8.3 platformdirs-2.5.2 poetry-1.1.15 poetry-core-1.0.8 ptyprocess-0.7.0 pycparser-2.21 pylev-1.4.0 pyparsing-3.0.9 requests-2.28.1 requests-toolbelt-0.9.1 shellingham-1.5.0 six-1.16.0 tomlkit-0.11.4 urllib3-1.26.12 virtualenv-20.16.3 webencodings-0.5.1 zipp-3.8.1
WARNING: You are using pip version 21.1.1; however, version 22.2.2 is available.
You should consider upgrading via the '/home/worker/venv/bin/python3 -m pip install --upgrade pip' command.
Removing intermediate container e4f4a87557ef
 ---> 84b62fa9951d
Step 5/21 : COPY poetry.lock pyproject.toml .
When using COPY with more than one source file, the destination must be a directory and end with a /