.drone.yml

@@ -4,7 +4,7 @@ name: default
 
 steps:
   - name: build
-    image: node
+    image: node:lts
     commands:
       - npm install
       - npm run build

package.json

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "autoprefixer": "10.2.6",
-    "cssnano": "4.1.11",
+    "cssnano": "5.0.5",
     "del": "6.0.0",
     "gulp": "4.0.2",
     "gulp-concat": "2.6.1",