Add automatic repository owner to image naming

- Use github.repository_owner in workflow
- Image format: REGISTRY_URL/owner/APP_NAME:latest
- Works automatically with Gitea registry
- Template-friendly: forks use their own owner
- Update documentation with new format

.gitea/workflows/build-and-deploy.yml

@@ -23,9 +23,9 @@ jobs:
       - name: Build+push ${{ vars.APP_NAME }}
         run: |
           cd nuxt4
-          docker build -t $REG/$APP_NAME:${{ github.sha }} -t $REG/$APP_NAME:latest .
-          docker push $REG/$APP_NAME:${{ github.sha }}
-          docker push $REG/$APP_NAME:latest
+          docker build -t $REG/${{ github.repository_owner }}/$APP_NAME:${{ github.sha }} -t $REG/${{ github.repository_owner }}/$APP_NAME:latest .
+          docker push $REG/${{ github.repository_owner }}/$APP_NAME:${{ github.sha }}
+          docker push $REG/${{ github.repository_owner }}/$APP_NAME:latest
 
 #───────────────── deploy ─────────────────
   deploy:
@@ -33,6 +33,7 @@ jobs:
     runs-on: docker
     env:
       REG: ${{ vars.REGISTRY_URL }}
+      REPO_OWNER: ${{ github.repository_owner }}
       APP_NAME: ${{ vars.APP_NAME }}
       # Variables de entorno para docker-compose
       APP_DOMAIN: ${{ vars.APP_DOMAIN }}
@@ -46,7 +47,7 @@ jobs:
         run: |
           echo "ℹ️  Deploying ${{ vars.APP_NAME }}"
           echo "   Domain: ${{ vars.APP_DOMAIN }}"
-          echo "   Registry: ${{ vars.REGISTRY_URL }}"
+          echo "   Image: ${{ vars.REGISTRY_URL }}/${{ github.repository_owner }}/${{ vars.APP_NAME }}:latest"
           echo "   Network: principal"
 
       - name: Pull fresh images used in compose