feat: advanced dockerfile example

[RealVishy]

Implement a Node.js container which installs a portfolio website from astro, edits the cv.json and then forwards the necessary ports. Afterwards, implement github actions to automatically build the image and upload to ghcr.

• Node.js Base Image
• Install pnpm
• Use cv.json we specify
• Forward required ports for hosting site
• Build and upload container with github actions

[RealVishy]

yeah no we just reusing the rust example cause i was busy, but i would like to implement this sometime if i have time

#7