Switch to Ubuntu Noble base image with Python 3.12

- Use ubuntu:noble-20260113 base image instead of python:3.12-slim
- Use Ubuntu's built-in Python 3.12
- Run container as non-root user for improved security

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: shahidhk

CHANGELOG.md

@@ -6,6 +6,11 @@ This changelog documents the changes between release versions.
 
 Changes to be included in the next upcoming release
 
+## [0.2.7] - 2026.02.04
+
+* Switch to `ubuntu:noble-20260113` base image with Python 3.12
+* Run container as non-root user for improved security
+
 ## [0.2.6] - 2025.12.12
 
 * Use pip 25.3 or greater

Dockerfile

@@ -1,25 +1,17 @@
 FROM ubuntu:noble-20260113
 
-# Install dependencies and add deadsnakes PPA for latest Python
+# Install Python 3.12 (Ubuntu Noble default), venv, curl, and git
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-      software-properties-common \
-      gpg-agent && \
-    add-apt-repository -y ppa:deadsnakes/ppa && \
-    apt-get update && \
-    apt-get install -y --no-install-recommends \
-      python3.13 \
-      python3.13-venv \
+      python3 \
+      python3-venv \
       curl \
       git && \
-    apt-get purge -y software-properties-common gpg-agent && \
-    apt-get autoremove -y && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Create python symlinks for compatibility
-RUN ln -sf /usr/bin/python3.13 /usr/bin/python && \
-    ln -sf /usr/bin/python3.13 /usr/bin/python3
+# Create python symlink for compatibility
+RUN ln -sf /usr/bin/python3 /usr/bin/python
 
 COPY /docker /scripts
 COPY /functions /functions