Add Gitea Actions workflow for container builds; v2.0.44

Mirrors the existing .github/workflows/docker-publish.yml so Gitea
Actions picks it up from the standard .gitea/workflows/ location.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.43",
+  "version": "2.0.44",
   "type": "module",
   "scripts": {
     "dev": "vite",