Initial /getting-started docs page

src/app/docs/getting-started/page.mdx

@@ -2,10 +2,56 @@ export const metadata = {
   title: "Getting Started - Documentation",
 };
 
+### Introduction
+
+Slug is a web application that offers to shorten urls in a simple, fast and secure way. It's built with [T3 Stack](https://create.t3.gg/), a web development stack made by [Theo](https://twitter.com/t3dotgg) focused on simplicity, modularity, and full-stack typesafety.
+
+### Prerequisites
+
+- 🍃 [Node.js LTS](https://nodejs.org/en/download/).
+- 🧡 [pnpm v8](https://pnpm.io/installation).
+- 🐈 A [GitHub](https://github.com/) account.
+- 🔎 A [Google](https://www.google.com/) account.
+- 💚 A [Turso](https://turso.tech/) account.
+- ☁️ A [Vercel](https://vercel.com/) account.
+
 ### Getting Started
 
-Welcome to the Slug documentation. This documentation is designed to help you get started with the project and provide you with the information you need to start contributing.
+Follow these steps to self-host Slug:
+
+1. **Clone the repository**:
+
+```bash
+git clone [email protected]:pheralb/slug.git 
+```
+
+2. **Install the dependencies**:
 
 ```bash
-npm install
-```
+pnpm install
+```
+
+3. **Set up environment variables**:
+
+Create a `.env` file in the root of the project with the following content:
+
+```bash
+# Database:
+DATABASE_URL= # By default: "file:./dev.db"
+TURSO_DATABASE_URL=
+TURSO_AUTH_TOKEN=
+
+# Auth.js =>
+AUTH_SECRET=
+AUTH_URL=
+
+# Github Provider =>
+GITHUB_ID=
+GITHUB_CLIENT_SECRET=
+
+# Google Provider =>
+GOOGLE_CLIENT_ID=
+GOOGLE_CLIENT_SECRET=
+```
+
+Ready. In the next steps, you will setup the database and the authentication providers. ✨