Issue #308 - Fix Dockerfile apt install failures for Phase 0 Lesson 7

[tudoranghelina91]

What this PR does

This PR adresses the apt package install failures when building the Dockerfile for Phase 0 / Lesson 7

Kind of change

• New lesson
• Fix to an existing lesson
• Translation
• New output (prompt, skill, agent, MCP server)
• Docs / website / tooling

Checklist

• Code runs without errors with the listed dependencies
• No comments in code files (docs explain, code is self-explanatory)
• Built from scratch first, then shown with a framework (for new lessons)
• Lesson folder matches LESSON_TEMPLATE.md structure
• ROADMAP.md row for the lesson is a markdown link ([Name](phases/...)), not bare text
• One lesson per commit (atomic per-lesson rule)
• Tested locally / code output matches what docs/en.md claims

Phase / lesson

Notes for reviewer

The package repository used doesn't have python3.12 in it's repositories

[coderabbitai]

📝 Walkthrough

Walkthrough

The Dockerfile and its matching documentation snippet switch the installed Python toolchain from 3.12 to 3.11 (apt packages, venv, dev, and update-alternatives target). The PyTorch install is updated to torch==2.4.1 (from 2.3.1), with torchvision and torchaudio no longer pinned to explicit versions.

Changes

Python 3.11 and PyTorch 2.4.1 Dockerfile Update

Layer / File(s)	Summary
Python version and PyTorch pins phases/00-setup-and-tooling/07-docker-for-ai/code/Dockerfile, phases/00-setup-and-tooling/07-docker-for-ai/docs/en.md	apt packages changed from python3.12/python3.12-venv/python3.12-dev to python3.11 equivalents; update-alternatives target updated to /usr/bin/python3.11; torch bumped from 2.3.1 to 2.4.1; explicit version pins removed from torchvision and torchaudio. Documentation snippet in en.md updated to match.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly matches the main change: fixing Phase 0 Lesson 7 Dockerfile apt install failures.
Description check	✅ Passed	The description matches the changeset, which updates the Phase 0 / Lesson 7 Dockerfile to fix package installation failures.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[tudoranghelina91]

@rohitg00 I was wondering if this PR could be reviewed please?