Make it possible to see built branches

[KillerX]

Since this is a more or less static site it should be possible to see the branches/PRs as a preview. See for example Netlify.

https://www.netlify.com/products/deploy-previews/

[laurensgroeneveld]

Since all documentation profits from this, it should perhaps be implemented in the https://github.com/bcc-code/bcc-documentation-base repository.

[adelinn]

Until we find a better solution for this, I found it useful to use this playground https://stackblitz.com/github/bcc-code/bcc-documentation-base/tree/main/vuepress
One can just add index.md with whatever content he tries to preview in the docs folder and run vuepress dev docs in the terminal.