docs: add docusaurus docs

* Created website for the docs inside /docs

* remove old docs and home page

* fix wrong redirection path

* remove most of the docs from the readme

* fix docs path

* undo package.json changes

* remove unused images

* rename "how to" route

---------

Co-authored-by: Elias Schneider <login@eliasschneider.com>

docs/docs/setup/installation.md

@@ -0,0 +1,45 @@
+---
+id: installation
+---
+
+# Installation
+
+### Installation with Docker (recommended)
+
+1. Download the `docker-compose.yml` file
+2. Run `docker compose up -d`
+
+The website is now listening on `http://localhost:3000`, have fun with Pingvin Share 🐧!
+
+### Stand-alone Installation
+
+Required tools:
+
+- [Node.js](https://nodejs.org/en/download/) >= 16
+- [Git](https://git-scm.com/downloads)
+- [pm2](https://pm2.keymetrics.io/) for running Pingvin Share in the background
+
+```bash
+git clone https://github.com/stonith404/pingvin-share
+cd pingvin-share
+
+# Checkout the latest version
+git fetch --tags && git checkout $(git describe --tags `git rev-list --tags --max-count=1`)
+
+# Start the backend
+cd backend
+npm install
+npm run build
+pm2 start --name="pingvin-share-backend" npm -- run prod
+
+# Start the frontend
+cd ../frontend
+npm install
+npm run build
+API_URL=http://localhost:8080 # Set the URL of the backend, default: http://localhost:8080
+pm2 start --name="pingvin-share-frontend" .next/standalone/server.js
+```
+
+**Uploading Large Files**: By default, Pingvin Share uses a built-in reverse proxy to reduce the installation steps. However, this reverse proxy is not optimized for uploading large files. If you wish to upload larger files, you can either use the Docker installation or set up your own reverse proxy. An example configuration for Caddy can be found in `./Caddyfile`.
+
+The website is now listening on `http://localhost:3000`, have fun with Pingvin Share 🐧!