chore(docker): upgrade to Python 3.12-slim base image

[Pouyanpi]

Description

Switch base image from python:3.10 to python:3.12-slim for improved performance and smaller image size. Use --no-install-recommends for apt package installation and clean up apt cache to reduce final image size.

Related Issue(s)

Checklist

• I've read the CONTRIBUTING guidelines.
• I've updated the documentation if applicable.
• I've added tests if applicable.
• @mentions of the person or team responsible for reviewing proposed changes.

[greptile-apps]

Greptile Overview

Greptile Summary

Upgraded Docker base image from python:3.10 to python:3.12-slim and implemented Docker best practices for image size optimization.

Key Changes:

• Base image changed to python:3.12-slim for improved performance and reduced image size
• Added --no-install-recommends flag to apt-get install to avoid unnecessary packages
• Added cache cleanup (rm -rf /var/lib/apt/lists/*) in the same RUN layer to reduce final image size

Compatibility:

• Python 3.12 is fully supported according to pyproject.toml (supports Python >=3.10,<3.14)
• All dependencies have appropriate version constraints for Python 3.12

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The changes are well-structured and follow Docker best practices. Python 3.12 is officially supported by the project (as confirmed in pyproject.toml line 48), and the slim variant + optimization techniques will reduce image size without affecting functionality. The modifications are contained to a single file with no breaking changes.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
Dockerfile	5/5	Upgraded base image from python:3.10 to python:3.12-slim and applied Docker best practices for apt cache cleanup and minimal package installation

Sequence Diagram

sequenceDiagram participant User participant Docker participant BaseImage as python:3.12-slim participant AptGet as apt-get participant Poetry participant NemoGuardrails User->>Docker: docker build Docker->>BaseImage: FROM python:3.12-slim BaseImage-->>Docker: Base image loaded Docker->>AptGet: apt-get update Docker->>AptGet: apt-get install --no-install-recommends git gcc g++ AptGet-->>Docker: Dependencies installed Docker->>AptGet: rm -rf /var/lib/apt/lists/* Note over AptGet,Docker: Cache cleanup reduces image size Docker->>Docker: Set POETRY_VERSION=1.8.2 Docker->>Poetry: pip install poetry Poetry-->>Docker: Poetry installed Docker->>Docker: Copy pyproject.toml & poetry.lock Docker->>Docker: Copy project files Docker->>Poetry: poetry install --all-extras Poetry-->>Docker: Dependencies installed Docker->>NemoGuardrails: Download embedding model Docker->>NemoGuardrails: Test CLI (--help) Docker->>Poetry: Final poetry install Docker-->>User: Image ready with Python 3.12 

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[greptile-apps]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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