Upgrade Python from 3.10 to 3.12 (#825)

- Update Dockerfile base images (builder + runtime) to python:3.12-slim
- Bump psycopg2 from 2.9.7 to 2.9.11 (Python 3.12 wheel support)
- Update CI workflow Python versions from 3.10/3.11 to 3.12

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: paynejd

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Run linting rules
       uses: actions/setup-python@v4
       with:
-        python-version: '3.10'
+        python-version: '3.12'
     - run: pip install -r requirements.txt
     - run: pylint -j0 core/
 
@@ -62,7 +62,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - name: Cache pip dependencies
         uses: actions/cache@v3
         with:

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.10-slim AS builder
+FROM python:3.12-slim AS builder
 ENV PYTHONUNBUFFERED 1
 ENV PYTHONDONTWRITEBYTECODE 1
 
@@ -14,7 +14,7 @@ ADD requirements.txt /code/
 
 RUN pip wheel --no-cache-dir --wheel-dir /code/wheels -r requirements.txt
 
-FROM python:3.10-slim
+FROM python:3.12-slim
 ENV PYTHONUNBUFFERED 1
 ENV PYTHONDONTWRITEBYTECODE 1
 

requirements.txt

@@ -1,5 +1,5 @@
 Django==4.2.16
-psycopg2==2.9.7
+psycopg2==2.9.11
 gunicorn==22.0.0 #production server
 whitenoise==6.5.0 #serving swagger static files
 djangorestframework==3.14.0