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.

pyproject.toml

@@ -0,0 +1,26 @@
+[project]
+name = "company-site"
+version = "0.1.0"
+description = "Django site for AIML Operations"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "django==5.0",
+    "django-enum==2.1.0",
+    "django-phonenumber-field==8.0.0",
+    "django-recaptcha==4.0.0",
+    "gunicorn==23.0.0",
+    "phonenumbers==9.0.0",
+    "psycopg2-binary==2.9.10",
+    "python-dateutil==2.9.0.post0",
+    "typing-extensions==4.8.0",
+    "whitenoise==6.9.0",
+]
+
+[dependency-groups]
+dev = [
+    "pre-commit==4.1.0",
+]
+
+[tool.uv]
+package = false