fix registry name

Author: pashagolub

.github/actions/build-docker/action.yml

@@ -65,15 +65,15 @@ runs:
       if: inputs.push == 'true'
       uses: docker/login-action@v3
       with:
-        registry: ${{ inputs.registry }}
+        registry: ${{ inputs.registry == 'docker.io' && '' || inputs.registry }}
         username: ${{ inputs.username }}
         password: ${{ inputs.password }}
 
     - name: Extract metadata
       id: meta
       uses: docker/metadata-action@v5
       with:
-        images: ${{ inputs.registry }}/${{ inputs.image-name }}
+        images: ${{ inputs.image-name }}
         tags: |
           # For releases: apply SemVer tags and latest (excludes pre-releases automatically)
           type=semver,pattern={{version}}