perf: 保留基础镜像缓存 + kubectl 装到 /usr/bin 避开 bind mount 冲突

.gitea/workflows/deploy.yaml

@@ -91,7 +91,7 @@ jobs:
               curl -LO "https://files.m.daocloud.io/dl.k8s.io/release/v1.28.0/bin/linux/amd64/kubectl" && break
               echo "Download attempt $attempt failed, retrying in 5s..." && sleep 5
             done
-            chmod +x kubectl && mv kubectl /usr/local/bin/
+            chmod +x kubectl && mv kubectl /usr/bin/kubectl
           fi
           kubectl version --client
 
@@ -216,7 +216,7 @@ jobs:
         if: always()
         run: |
           docker container prune -f
-          docker image prune -a -f
+          docker image prune -f
           docker builder prune -a -f
           echo "Disk usage after cleanup:"
           df -h / | tail -1