[improvement]: Improve the docker build speed by using the buildkit cache mount

[Zheaoli]

1~3 main use cases of the proposed improvement

For now, we will install all the packages whenever we build the docker image. But we should notice that the dependency change is much less than the code change; this means that most packages can be reused by caching.

I have made a PR #401 to cache the system package install result. After #401, we can use the buildkit cache mount to cache the pnpm package data. FYI https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/reference.md#run---mounttypecache

After the optimisation, I think we can make the single image build time from more one and half minutes to a few seconds

Ideas for solution

No response

what types of users can benefit from using your proposed improvement

No response

Additional context

No response

[Zheaoli]

Alright, https://pnpm.io/cli/fetch may help us