Add Django site, Docker packaging, and beta/prod Gitea deploys.

Unignore site/ (was blocked by mkdocs /site rule), add compose/Docker/uv tooling, and split deploys so push to main goes to beta while prod stays manual.

site/accounts/urls.py

@@ -0,0 +1,17 @@
+from django.contrib.auth import views as auth_views
+from django.urls import path
+
+app_name = "accounts"
+
+urlpatterns = [
+    path(
+        "login/",
+        auth_views.LoginView.as_view(template_name="accounts/login.html"),
+        name="login",
+    ),
+    path(
+        "logout/",
+        auth_views.LogoutView.as_view(),
+        name="logout",
+    ),
+]