Devcontainer fails to start

[R0Wi]

Right now the devcontainer is using Python 3.10. The postCreateCommand fails because requirements.txt contains dependencies which are not compatible with Python 3.10.

Running the postCreateCommand from devcontainer.json...

python3 -m pip install -r requirements.txt && ...

ERROR: Ignored the following versions that require a different python version: 0.94 Requires-Python ~=2.7; 0.94.1 Requires-Python ~=2.7; 0.94rc1 Requires-Python ~=2.7; 1.0.0 Requires-Python >=3.11; 1.1.0 Requires-Python >=3.11; 8.2.0 Requires-Python >=3.11; 8.2.0rc1 Requires-Python >=3.11; 8.2.0rc2 Requires-Python >=3.11; 8.2.1 Requires-Python >=3.11; 8.2.2 Requires-Python >=3.11; 8.2.3 Requires-Python >=3.11; 8.3.0 Requires-Python >=3.11; 9.0.0 Requires-Python >=3.11; 9.0.0rc1 Requires-Python >=3.11; 9.0.0rc2 Requires-Python >=3.11; 9.0.0rc3 Requires-Python >=3.11; 9.0.0rc4 Requires-Python >=3.11; 9.0.1 Requires-Python >=3.11; 9.0.2 Requires-Python >=3.11; 9.0.3 Requires-Python >=3.11; 9.0.4 Requires-Python >=3.11; 9.1.0rc1 Requires-Python >=3.12; 9.1.0rc2 Requires-Python >=3.12
ERROR: Could not find a version that satisfies the requirement sphinx-reredirects==1.0.0 (from versions: 0.0.0, 0.0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6)
ERROR: No matching distribution found for sphinx-reredirects==1.0.0

[notice] A new release of pip is available: 23.0.1 -> 25.3
[notice] To update, run: pip install --upgrade pip
[16963 ms] postCreateCommand from devcontainer.json failed with exit code 1. Skipping any further user-provided commands.

I'd suggest let's use Python 3.12 as base (same as in CI/CD).