Dockerize Django app with dev/beta/prod env config and uv.

Replace hardcoded settings with environment-driven config, add Docker
compose for local and production deploys, migrate from pip to uv, and
split Gitea workflows so PRs run tests only while master pushes deploy.

.env.prod.example

@@ -0,0 +1,41 @@
+# Server-side production environment file.
+# Copy to /home/westfarn/Documents/django_live_sites/Company_Site/.env
+# This file is NOT deployed from git — rsync excludes .env so server values persist.
+
+# Environment level: dev | beta | prod
+DJANGO_ENV=prod
+DJANGO_DEBUG=false
+DJANGO_SECRET_KEY=replace-with-a-long-random-secret
+DJANGO_ALLOWED_HOSTS=aimloperations.com,www.aimloperations.com
+
+# Logging (optional override; defaults: dev=DEBUG, beta=INFO, prod=WARNING)
+# DJANGO_LOG_LEVEL=WARNING
+
+# PostgreSQL — DATABASE_URL is used by Django; DB_* are used by the db container.
+DATABASE_URL=postgres://company_site:replace-db-password@db:5432/company_site
+DB_NAME=company_site
+DB_USER=company_site
+DB_PASSWORD=replace-db-password
+
+# Analytics
+TIANJI_ENABLED=true
+TIANJI_TRACKER_URL=https://tianji.aimloperations.com/tracker.js
+TIANJI_WEBSITE_ID=replace-with-production-website-id
+
+# reCAPTCHA
+RECAPTCHA_PUBLIC_KEY=replace-with-production-public-key
+RECAPTCHA_PRIVATE_KEY=replace-with-production-private-key
+
+# Email (SMTP2GO)
+EMAIL_HOST=mail.smtp2go.com
+EMAIL_HOST_USER=replace-with-smtp-user
+EMAIL_HOST_PASSWORD=replace-with-smtp-password
+EMAIL_PORT=2525
+EMAIL_USE_TLS=true
+
+# Gunicorn
+GUNICORN_WORKERS=2
+GUNICORN_BIND=0.0.0.0:8000
+
+# Host port exposed by docker-compose.prod.yml
+WEB_PORT=8000