Use python:3-slim base image

[janhoy]

No description provided.

[github-actions]

Review with suggested changes

[github-actions]

This was converted to logchange format. Let's remove it.

Suggested change

this then (#111) (Jon Blow, Jane Snow)

[github-actions]

🔄 I've converted the legacy changelog entry to logchange format!

I detected a change to CHANGELOG.md and converted it to the logchange format below.

Suggested Logchange Entry for changelog/unreleased/pr-16-use-python-3-slim-base-image.yml:

title: Use python:3-slim base image
type: dependency_update
description: Updated Docker base image from python:3-slim AS builder to python:3-slim
authors:
  - name: Jon Blow
  - name: Jane Snow
issues:
  - 111

What to do next:

1. ✅ Create the logchange entry:

   • Create a new file at changelog/unreleased/pr-16-use-python-3-slim-base-image.yml
   • Copy the YAML above into it

2. ⚠️ Remove the legacy changes:

   • I've added suggested edits to remove the lines you added to CHANGELOG.md
   • Review the suggestions in the PR review and accept them

3. 📝 Review before merging:

   • Check the generated entry is accurate
   • Adjust if needed
   • Feel free to edit the logchange YAML

Why?
This project uses logchange format for changelog entries, not the traditional CHANGELOG.md format. Using logchange ensures consistency and better tooling support.