fix(ci): Prevent duplicate Docker tags in GitHub Actions

- Add latest=false flavor to both backend and frontend jobs
- Fix confusion between latest and latest-frontend tags
- Ensure proper image separation in Docker registries

.github/workflows/release.yml

@@ -62,10 +62,12 @@ jobs:
            registry: ghcr.io
            username: ${{ github.repository_owner }}
            password: ${{ secrets.GITHUB_TOKEN }}
-       - name: Docker meta backend
+        - name: Docker meta backend
          id: meta-backend
          uses: docker/metadata-action@v5
          with:
+           flavor: |
+             latest=false
            # list of Docker images to use as base name for tags
            images: |
              elisiariocouto/leggen
@@ -106,10 +108,12 @@ jobs:
            registry: ghcr.io
            username: ${{ github.repository_owner }}
            password: ${{ secrets.GITHUB_TOKEN }}
-       - name: Docker meta frontend
+        - name: Docker meta frontend
          id: meta-frontend
          uses: docker/metadata-action@v5
          with:
+           flavor: |
+             latest=false
            # list of Docker images to use as base name for tags
            images: |
              elisiariocouto/leggen