How to build the documentation? How is it rendered?

Q1: How to build the documentation?

Hello, Protobuf Team.

Recently, I tried to build the Protobuf's Documentation from this repo's source on Windows. However, after I followed the commands provided by .github/workflows/gh-pages.yml, it still failed.

First of all, I prepared Npm dependencies and Hugo executable:

C:\Users\hwhsu1231>where npm
C:\Program Files\nodejs\npm
C:\Program Files\nodejs\npm.cmd

C:\Users\hwhsu1231>npm install autoprefixer postcss postcss-cli

added 74 packages in 1m

19 packages are looking for funding
  run `npm fund` for details
npm notice
npm notice New minor version of npm available! 9.6.7 -> 9.8.1
npm notice Changelog: https://github.com/npm/cli/releases/tag/v9.8.1
npm notice Run npm install -g npm@9.8.1 to update!
npm notice

C:\Users\hwhsu1231>npm install -g npm@9.8.1

added 1 package in 10s

28 packages are looking for funding
  run `npm fund` for details

C:\Users\hwhsu1231>where hugo && hugo version
C:\Hugo\bin\hugo.exe
hugo v0.115.4-dc9524521270f81d1c038ebbb200f0cfa3427cc5+extended windows/amd64 BuildDate=2023-07-20T06:49:57Z VendorInfo=gohugoio

Then, git clone the repo and run hugo --minify:

D:\Repo\tmp>git clone https://github.com/protocolbuffers/protocolbuffers.github.io.git protobuf-docs
Cloning into 'protobuf-docs'...
remote: Enumerating objects: 9670, done.
remote: Counting objects: 100% (1797/1797), done.
remote: Compressing objects: 100% (257/257), done.
remote: Total 9670 (delta 958), reused 1744 (delta 940), pack-reused 7873
Receiving objects: 100% (9670/9670), 12.21 MiB | 3.60 MiB/s, done.
Resolving deltas: 100% (5301/5301), done.

D:\Repo\tmp>cd protobuf-docs

D:\Repo\tmp\protobuf-docs>hugo --minify
Total in 23 ms
Error: failed to load modules: failed to download modules: binary with name "go" not found

What happened? What do I miss?

Q2: How is the documentation rendered?

BTW, I also checked out to the gh-pages branch to see what the artifact looks like. However, it seems different than what https://protobuf.dev/ displays.

D:\Repo\tmp\protobuf-docs>git checkout gh-pages
Switched to a new branch 'gh-pages'
branch 'gh-pages' set up to track 'origin/gh-pages'.

If I want to see the rendered documentation locally, what should I do?