CI: registry auth via DOCKER_CONFIG secret (kassa pattern), GITEA_TOKEN fallback

.gitea/workflows/build.yml

@@ -71,7 +71,16 @@ jobs:
           docker rm -f dsh-smoke
 
       - name: Login to gitea.archeon.io registry
-        run: echo "${{ secrets.GITEA_TOKEN }}" | docker login gitea.archeon.io -u ${{ gitea.actor }} --password-stdin
+        env:
+          DOCKER_CONFIG_FILE: ${{ secrets.DOCKER_CONFIG }}
+        run: |
+          mkdir -p ~/.docker
+          if [ -n "$DOCKER_CONFIG_FILE" ]; then
+            echo "$DOCKER_CONFIG_FILE" > ~/.docker/config.json
+            echo "registry auth: секрет DOCKER_CONFIG (как в kassa)"
+          else
+            echo "${{ secrets.GITEA_TOKEN }}" | docker login gitea.archeon.io -u ${{ gitea.actor }} --password-stdin
+          fi
 
       - name: Push images
         env: