[TheRealDanii]

Description

The kubernetes_engine/django_tutorial Dockerfile still builds on gcr.io/google_appengine/python, which is no longer maintained and ships Python 3.7 or older. requirements.txt only installs Django when python_version >= "3.12", so in that image Django is never installed and gunicorn fails to load mysite.wsgi.

This replaces it with python:3.14-slim, the same base image as the run/ samples. The container still listens on port 8080 (which polls.yaml expects) and runs the same gunicorn mysite.wsgi command. The virtualenv is dropped because the official image doesn't need one.

How I tested (locally with podman, not on a live GKE cluster):

• podman build succeeds
• podman run --rm <img> python -c "import django, gunicorn, psycopg2" works and reports Django 6.1.1
• podman run with the default CMD: gunicorn boots and listens on 0.0.0.0:8080

Checklist

Testing

• I have tested this change on a live environment and verified it works as intended.

Compliance & Style

• I have followed the Sample Guidelines.
• The README is updated with all relevant information (if applicable). N/A: no README changes needed.
• If this PR adds a new sample directory: I updated the CODEOWNERS file. N/A: no new directory.

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Post-Approval Actions

• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request updates the Dockerfile for the Django tutorial in the Kubernetes Engine directory. It replaces the deprecated Google App Engine Python base image with the official python:3.14-slim image, configures environment variables for unbuffered logging and the default port, optimizes the build process by leveraging layer caching for dependencies, and uses exec to run Gunicorn. There are no review comments to address, and the changes look solid and follow modern Docker best practices.