Weird errors seem to happen on Twine on that image:
```
Traceback (most recent call last):
File "/usr/bin/twine", line 5, in <module>
from twine.__main__ import main
File "/usr/lib/python3.11/site-packages/twine/__init__.py", line 32, in <module>
import importlib.metadata
File "/usr/lib/python3.11/importlib/metadata/__init__.py", line 17, in <module>
from . import _adapters, _meta
File "/usr/lib/python3.11/importlib/metadata/_adapters.py", line 3, in <module>
import email.message
File "/usr/lib/python3.11/email/message.py", line 15, in <module>
from email import utils
File "/usr/lib/python3.11/email/utils.py", line 28, in <module>
import random
File "/usr/lib/python3.11/random.py", line 49, in <module>
from math import log as _log, exp as _exp, pi as _pi, e as _e, ceil as _ceil
ImportError: Error relocating /usr/lib/python3.11/lib-dynload/math.cpython-311-x86_64-linux-musl.so: _PyModule_Add: symbol not found
```
- Renamed _Post-installation_ README section as _Configuration_.
- Docs style tweaks for the latest version of the Sphinx theme.
- Adapted the docs index to the new structure of the wiki.
This fixes the case where Platydock is called within the context of a
virtual environment, but it needs to generate a Docker image - and
therefore, unless the host virtual environment, it needs
--break-system-packages to write to /usr.
If the Platypush setup.py is found in the current directory, then use
that directory as the base for the new image.
Otherwise, clone the repo on the fly and build the image from there.