Add DevContainer

[mathieu-benoit]

Add DevContainer

To simplify and accelerate contributions, let's have a DevContainer showing the tools and versions needed.

For example, currently, opening this repo in Codespace, will land to this error with yarn install:

yarn install v1.22.22
[1/4] Resolving packages...
[2/4] Fetching packages...
error hugo-cli@0.14.0: The engine "node" is incompatible with this module. Expected version ">= 20". Got "16.20.2"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

Which is not good, that's because the default Node version is v16.20.2.

This PR adds the DevContainer with the required tools:

• Node 20
• Go
  With that someone can just come and run this right away, and easily test and contribute:

yarn install
yarn run hugo server

Not mandatory, but we are also adding in this DevContaine these tools:

• Docker
• Kind
• score-compose
• score-k8s