chore(readme): create selfhosting guide

README.md

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+# web-expl
+
+Explore the internet in 3-dimensional space.
+Built with NextJS, TailwindCSS and ThreeJS.
+
+## Demo
+You can try out the live demo [here](https://web-expl.qwq.sh).
+
+![Visualizer](./assets/screenshot.png)
+
+## Deployment
+
+You can selfhost `web-expl` using Docker.
+To deploy the scraper, run:
+
+```bash
+  docker run -p <OUTGOING_PORT>:3000 --restart=always --name web-expl ghcr.io/angelsflyinhell/web-expl
+```
+
+## Installation
+
+Install `web-expl` with npm:
+
+```bash
+  gh repo clone angelsflyinhell/web-expl
+  cd web-expl
+
+  npm install
+
+  npm run dev
+```