ci: use docker-container buildx builder (host network) — fixes DNS instability in default driver

.gitea/workflows/release.yaml

@@ -57,11 +57,25 @@ jobs:
           apk add --no-cache docker-cli >/dev/null 2>&1 || true
           echo "${REGISTRY_TOKEN}" | docker login ${REGISTRY} -u oauth2 --password-stdin
 
+      - name: Prepare multi-arch builder
+        # docker-container driver: изолированный buildkit, host network (стабильный DNS).
+        # qemu-эмуляция arm64 из коробки (binfmt зарегистрирован на хосте).
+        run: |
+          set -e
+          docker buildx create \
+            --name ci-builder \
+            --driver docker-container \
+            --driver-opt network=host \
+            --bootstrap \
+            || docker buildx inspect --builder ci-builder --bootstrap
+          docker buildx ls
+
       - name: Build and push bot image (amd64 + arm64)
         working-directory: /tmp/release-src
         run: |
           set -e
           docker buildx build \
+            --builder ci-builder \
             --platform linux/amd64,linux/arm64 \
             --file ./Dockerfile \
             --tag ${REGISTRY}/telegram-market/telegram-shop:${VERSION} \
@@ -74,6 +88,7 @@ jobs:
         run: |
           set -e
           docker buildx build \
+            --builder ci-builder \
             --platform linux/amd64,linux/arm64 \
             --file ./admin-next/Dockerfile \
             --tag ${REGISTRY}/telegram-market/telegram-shop-admin:${VERSION} \