Migrate CI/CD from Gitea Registry to Docker Hub, remove Watchtower

- Switch runner to self-hosted
- Docker login and image paths now target docker.io / DEINUSERNAME
- Replace Watchtower with Unraid built-in container update
- Add section for external users pulling the public image
- Update .gitignore to exclude .claude/

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

.gitea/workflows/deploy.yaml

@@ -6,19 +6,19 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Login to Gitea Registry
+      - name: Login to Docker Hub
         run: |
-          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login git.nirodan.de \
+          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login docker.io \
             -u ${{ secrets.REGISTRY_USER }} --password-stdin
 
       - name: Build & Push latest + version tag
         run: |
-          docker build -t git.nirodan.de/nirdoan/tools-app:latest .
-          docker build -t git.nirodan.de/nirdoan/tools-app:${{ gitea.ref_name }} .
-          docker push git.nirodan.de/nirdoan/tools-app:latest
-          docker push git.nirodan.de/nirdoan/tools-app:${{ gitea.ref_name }}
+          docker build -t DEINUSERNAME/tools-app:latest .
+          docker build -t DEINUSERNAME/tools-app:${{ gitea.ref_name }} .
+          docker push DEINUSERNAME/tools-app:latest
+          docker push DEINUSERNAME/tools-app:${{ gitea.ref_name }}