add Network smoke test

.gitea/workflows/ci.yml

@@ -14,18 +14,32 @@ jobs:
       - name: Checkout
         uses: https://gitea.nikitapozd.dev/actions/checkout@v6
 
+      - name: Network smoke test
+        run: |
+          set -eux
+          ip link | sed -n '1,80p'
+          echo "--- resolv.conf ---"
+          cat /etc/resolv.conf || true
+          echo "--- DNS ---"
+          nslookup dl-cdn.alpinelinux.org || true
+          echo "--- download APKINDEX (10s) ---"
+          wget -S -O /dev/null --timeout=10 --tries=1 \
+            https://dl-cdn.alpinelinux.org/alpine/v3.22/main/x86_64/APKINDEX.tar.gz
+
       - name: Force APK to IPv4-only mirror
         shell: sh
         run: |
           set -eux
           sed -i 's|https://dl-cdn.alpinelinux.org|https://dl-4.alpinelinux.org|g' /etc/apk/repositories
           cat /etc/apk/repositories
-      - name: Install tools
-        shell: sh
+
+      - name: Install tools (curl, jq) with verbose
         run: |
           set -eux
-          APK_PROGRESS=plain apk update -v --no-progress
-          APK_PROGRESS=plain apk add -v --no-cache curl jq
+          export APK_PROGRESS=plain
+          apk update -v --no-progress
+          apk add -v --no-cache curl jq
+      
 
 #      - name: Install tools (curl, jq) with debug
 #        shell: sh