…ntial to add for it, we should not have it in the deployed docs because it just serves as a distraction atm

…al title

Improve the getting started section for setting up Polykey:
- Updated instructions for installing PK-CLI.
- Added detailed steps for bootstrapping the first node.
- Included screenshots for better visual guidance.
- Added inline notes, warnings, and tips to enhance user understanding.
- Ensured consistent terminology and clear explanations throughout the guide.

…ntainer and update sidebar configuration

…syntax highlighting

… and explain --node-path usage