Add getting started script guide with Zitadel (#76)

Add getting started script guide with Zitadel

group and update order of IDPs

src/pages/selfhosted/selfhosted-guide.mdx

@@ -13,7 +13,58 @@ If you would like to learn more about the architecture please refer to the [Arch
     We run NetBird in the cloud, and it will take less than 5 minutes to get started with our managed version. [Check it out!](https://netbird.io/pricing)
 </Note>
 
-## Requirements
+
+## Getting started with NetBird and Zitadel
+In this guide, we will guide you through deploying NetBird with [Zitadel](https://zitadel.com/)
+as the identity provider for user management using a getting started setup script and docker containers.
+
+<Note>
+    This is the quickest way to try self-hosted NetBird. It should take around 5 minutes to get started if you already have a public domain and a VM.
+    Follow the [Advanced guide with a custom identity provider](#advanced-guide-with-a-custom-identity-provider) for installations with different IDPs.
+</Note>
+
+### Requirements
+
+**Infrastructure requirements:**
+- A Linux VM with at least **1CPU** and **2GB** of memory.
+- The VM should be publicly accessible on TCP ports **80** and **443** and UDP ports: **3478**, **49152-65535**.
+- **Public domain** name pointing to the VM.
+
+**Software requirements:**
+- Docker installed on the VM with the docker compose plugin ([Docker installation guide](https://docs.docker.com/engine/install/)) or docker with docker-compose in version 2 or higher.
+- [jq](https://jqlang.github.io/jq/) installed. In most distributions
+Usually available in the official repositories and can be installed with `sudo apt install jq` or `sudo yum install jq`
+- [curl](https://curl.se/) installed.
+Usually available in the official repositories and can be installed with `sudo apt install curl` or `sudo yum install curl`
+
+### Download and run the script
+
+Download and run the installation script in a single line:
+```bash
+export NETBIRD_DOMAIN=netbird.example.com; curl -fsSL https://github.com/netbirdio/netbird/releases/latest/download/getting-started-with-zitadel.sh | bash
+```
+If you want to check the script before running it, you can download it and run it locally:
+```bash
+curl -sSLO https://github.com/netbirdio/netbird/releases/latest/download/getting-started-with-zitadel.sh
+# check the script
+cat getting-started-with-zitadel.sh
+# run the script
+export NETBIRD_DOMAIN=netbird.example.com
+bash getting-started-with-zitadel.sh
+```
+<Note>
+    Replace `netbird.example.com` with your domain name.
+</Note>
+Once the script execution is complete, you can access your netbird instance via the URL `https://netbird.example.com` using the credentials displayed in your terminal.
+
+### Creating users
+If you want to add additional users, you can access Zitadel's management console via the URL `https://netbird.example.com/ui/console` with the same credentials. Follow the [Users guide](https://zitadel.com/docs/guides/manage/console/users)
+from Zitadel to add additional local users or integrate Zitadel with your existing identity provider by following the guide [Configure identity providers](https://zitadel.com/docs/guides/integrate/identity-providers).
+
+## Advanced guide with a custom identity provider
+This guide will walk you through deploying NetBird with a custom identity provider for user management.
+
+### Requirements
 
 - Virtual machine offered by any cloud provider (e.g., AWS, DigitalOcean, Hetzner, Google Cloud, Azure ...).
 - Any Linux OS.
@@ -25,7 +76,7 @@ If you would like to learn more about the architecture please refer to the [Arch
 
 For this tutorial we will be using domain ```demo.netbird.io``` which points to our Ubuntu 22.04 machine hosted at Hetzner.
 
-## Step 1: Get the latest stable NetBird code
+### Step 1: Get the latest stable NetBird code
 
 ```bash
 #!/bin/bash
@@ -43,7 +94,7 @@ Then switch to the infra folder that contains docker-compose file:
 ```bash
 cd netbird/infrastructure_files/
 ```
-## Step 2:  Prepare configuration files
+### Step 2:  Prepare configuration files
 
 To simplify the setup we have prepared a script to substitute required properties in the [docker-compose.yml.tmpl](https://github.com/netbirdio/netbird/tree/main/infrastructure_files/docker-compose.yml.tmpl) and [management.json.tmpl](https://github.com/netbirdio/netbird/tree/main/infrastructure_files/management.json.tmpl) files.
 
@@ -80,7 +131,7 @@ This can be any email address. [Let's Encrypt](https://letsencrypt.org/) will cr
     If you want to setup netbird with your own reverse-Proxy and without using the integrated letsencrypt, follow [this step here instead](#advanced-running-netbird-behind-an-existing-reverse-proxy).
 </Note>
 
-## Step 3: Configure Identity Provider (IDP)
+### Step 3: Configure Identity Provider (IDP)
 
 NetBird supports generic OpenID (OIDC) protocol allowing integration with any IDP following the specification.
 
@@ -99,7 +150,7 @@ Pick the one that suits your needs, follow the steps, and continue with this gui
 - Continue with [Okta](/selfhosted/identity-providers#okta).
 - Continue with [Auth0](/selfhosted/identity-providers#auth0).
 
-## Step 4: Disable single account mode (optional)
+### Step 4: Disable single account mode (optional)
 
 NetBird Management service runs in a single account mode by default since version v0.10.1.
 Management service was creating a separate account for each registered user before v0.10.1.
@@ -110,7 +161,7 @@ If you want to disable the single-account mode, set `--disable-single-account-mo
 [docker-compose.yml.tmpl](https://github.com/netbirdio/netbird/tree/main/infrastructure_files/docker-compose.yml.tmpl)
 `command` section of the `management` service.
 
-## Step 5: Run configuration script
+### Step 5: Run configuration script
 Make sure all the required properties set in the ```setup.env``` file and run:
 
 ```bash
@@ -119,12 +170,12 @@ Make sure all the required properties set in the ```setup.env``` file and run:
 
 This will export all the properties as environment variables and generate ```docker-compose.yml``` and ```management.json``` files substituting required variables.
 
-## Step 6: Run docker compose:
+### Step 6: Run docker compose:
 
 ```bash
 docker-compose up -d
 ```
-## Step 7: Check docker logs (Optional)
+### Step 7: Check docker logs (Optional)
 
 ```bash
 docker-compose logs signal