Prevent node_modules from override via mount (#16545)

In the section `Use Compose to develop locally`, a docker-compose file is shown which mounts the app directory into the `notes` container to be able to change the code without rebuilding the image. Unfortunately, the node_modules directory which was created during the build will be overridden as the whole working directory /app gets mounted. Therefore, this directory needs to be secured by adding it to the volumes.

language/nodejs/develop.md

@@ -140,6 +140,7 @@ services:
    - CONNECTIONSTRING=mongodb://mongo:27017/notes
   volumes:
    - ./:/app
+   - /app/node_modules
   command: npm run debug
 
  mongo: