added empty npm cache dir

docker-compose.yml

 version: '3.7'
 services:
   assets:
-    image: node:10
+    image: node:16
+    user: "1000:1000"
     volumes:
       - .:/usr/src/app
+      - .npm:/home/node/.npm
     working_dir: /usr/src/app
-    command: bash -c "npm install && npm run watch"
+    command: bash -c "chown 1000:1000 .npm && npm install && npm run watch"
   phpfpm:
     depends_on:
       - "assets"
@@ -42,3 +44,5 @@ services:
     volumes:
       - .:/html
     command: "su -s /bin/sh -c 'php artisan requests:fetcher' www-data"
+volumes:
+  node-cache:
\ No newline at end of file