debug gitea issue

.gitea/workflows/debug-network.yaml

@@ -0,0 +1,23 @@
+name: Debug job network
+on:
+  push:
+    branches: [main]
+jobs:
+  debug:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Show job container network
+        run: |
+          echo "=== /etc/hosts ==="
+          cat /etc/hosts
+          echo "=== ip addr ==="
+          ip addr || true
+          echo "=== ping server ==="
+          ping -c 1 server 2>&1 || true
+          echo "=== getent hosts server ==="
+          getent hosts server 2>&1 || true
+          echo "=== try 127.0.0.1:3000 ==="
+          curl -s -o /dev/null -w "%{http_code}" --connect-timeout 2 http://127.0.0.1:3000/ || echo "failed"
+          echo ""
+          echo "=== try host.docker.internal:3000 (if exists) ==="
+          curl -s -o /dev/null -w "%{http_code}" --connect-timeout 2 http://host.docker.internal:3000/ 2>/dev/null || echo "failed/skipped"