Laravel mix compilation very slow in Docker container

Question

Whenever I run,

docker-compose run --rm npm run production

Laravel mix takes around 15 minutes to complete the build. I suspect this is due to inherent slowness of Docker Desktop for Windows - I say this because even my Laravel site is loading slowly in my browser when accessed over localhost.

In order to attempt to speed up my Docker Desktop, I have created the following .wslconfig file in C:\Users<my_username>,

[wsl2] 
memory=8GB
processors=2

I am definitely using WSL version 2. Please refer:

The following https://github.com/docker/for-win/issues/1936#issuecomment-380257581 was promising: I excluded my project files from my Norton Antivirus' "scannable" files, temporarily disabled my Antivirus. After doing all of the above, I shutdown my WSL on my Windows by using wsl --shutdown which automatically shutdown Docker Desktop. I then restarted Docker Desktop. But after all this, npm run production is still frustratingly slow in my Docker Container.

I would be grateful to understand if I am missing something.

Here is my PC config:

I am using Windows 10 Home.

Here is the npm snippet from my docker-compose.yml file:

npm:
    build:
      context: ./dockerfiles
      dockerfile: node.dockerfile
    container_name: npm
    volumes:
      - ./src:/var/www/html
    ports:
      - 3008:3000
      - 3009:3001
    working_dir: /var/www/html
    entrypoint: ['npm']
    networks:
      - laravel

And the contents of node.dockerfile:

FROM node:14.5.0-alpine

The site ( configured using a separate NGINX DOCKER container ) itself is slow to load, this is why I suspect that this is related to Memory size issue of Docker Desktop. But I am happy to accept counter arguments to my theory, probably this might be the result of a misconfigured npm Docker container on my local. But whatever it is, npm is taking hell lot of time to build my project (no matter what I do)!