📖 docs: Update README.md (#189)

## Description
Update the readme file

## Related Issues
none

## Type of Change

- [ ] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature that changes existing
functionality)
- [x] Documentation update
- [ ] Other (please describe):

## Checklist

- [x] I have updated relevant documentation
- [x] My code follows the project's coding style
- [x] My changes generate no new warnings/errors

## Notes for Reviewers
none

## Screenshots/Demo
none

## Additional Context
none

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Documentation**
- Major overhaul of documentation structure and content for improved
clarity, modern presentation, and ease of navigation.
- Updated and expanded guides for installation, setup, architecture, and
command-line interfaces.
- Enhanced FAQ and troubleshooting sections with more comprehensive
answers and technical details.
- Added new guides for self-hosting with reverse proxy examples (Caddy,
Traefik) and developer notes.
- Improved theming, styling, and home page layout for the documentation
site.
  - Simplified main README to a minimalistic project header and tagline.
- Added new documentation files for Nestri Relay introduction and
container CLI parameters.
- Removed outdated or redundant documentation files and components to
streamline content.

- **Chores**
- Updated, reorganized, or removed configuration files for dependencies,
linting, and environment setup.
- Switched to a new documentation theme and updated related project
dependencies.
- Removed Renovate configuration and ESLint config specific to docs app.
- Adjusted TypeScript and package configurations for better
compatibility.

- **Style**
- Improved dark mode support and visual consistency across documentation
and components.
- Introduced new Tailwind CSS theming and animation support for the
documentation site.

- **New Features**
- Added example configuration files for deploying Nestri Relay with
Caddy and Traefik reverse proxies.
- Introduced new Tailwind CSS theming and animation support for the
documentation site.
- Added a new logo component supporting light/dark mode and optional
title display.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Victor Pahuus Petersen <49293748+victorpahuus@users.noreply.github.com>
Co-authored-by: Wanjohi <elviswanjohi47@gmail.com>
Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>

apps/docs/content/2.nestri-node/7.developer-notes.md

@@ -0,0 +1,36 @@
+---
+title: Developer Notes and Tips
+description: This is a collection of developer notes for Nestri Node.
+icon: 'lucide:wrench'
+
+---
+
+### Construct The Nestri Runner Docker Image
+Checkout your branch with the latest version of nestri and build the image `<your-nestri-image>` within git root folder:
+```bash [build docker image command]
+podman build -t <your-nestri-image>:latest -f containers/Containerfile.runner .
+```
+
+### Running other applications besides Steam
+When you followed the getting started guide, you already have a container running. You can get into your container to start your games or other applications:
+```bash [get into container command]
+podman exec -it nestri /bin/bash
+```
+
+For most games that are not DRM free you need a launcher. In this case use the umu launcher:
+```bash [install umu and mangohud command]
+pacman -S umu-launcher
+```
+
+You have to execute your game with the nestri user. If you have a linux game execute it like so:
+```bash [execute game command]
+su nestri
+source /etc/nestri/envs.sh
+GAMEID=0 PROTONPATH=GE-Proton mangohud umu-run <your-game.exe>
+```
+
+You could also use other launchers like Lutris to run other games.
+
+::alert{type="danger"}
+**Warning:** Running other applications besides Steam is not supported and may cause issues. We cannot provide support for this.
+::