Update how-to guide for creating posture checks

src/pages/how-to/posture-checks.mdx

@@ -1,4 +1,4 @@
-# Introduction
+# Posture Checks
 
 NetBird enables administrators to manage resource access through the creation of access policies, dictating which peer
 groups can interact. Posture checks serve as an extension to these policies, augmenting their capabilities by allowing
@@ -26,12 +26,47 @@ kernel version.
 ### Geo Check
 
 The Geo Check examines the geographical location of the connecting device based on its connection IP address.
-This check allows administrators to enforce access restrictions based on geographic regions.
-
+This check allows administrators to enforce access restrictions based on geographic regions, offering both a country-wide
+and city-level granularity.
 
 ## Managing Posture Checks
 
 ### Creating posture check
+Access the `Access Control` tab, the `Posture Checks` section and click `Create Posture Check`.
+
+<p>
+    <img src="/docs-static/img/how-to-guides/add-posture-check.png" alt="high-level-dia" className="imagewrapper"/>
+</p>
+
+That will open a posture checks configuration screen where you can configure the checks.
+
+<p>
+    <img src="/docs-static/img/how-to-guides/posture-check-create-list.png" alt="high-level-dia" className="imagewrapper"/>
+</p>
+
+In the example below, we are creating a posture check which will only allow the client running NetBird version `0.25.0`
+or greater to connect and access the network resources.
+
+Select `NetBird Client Version` check option and set with the following information:
+- Version: `0.25.0`
+
+<p>
+    <img src="/docs-static/img/how-to-guides/netbird-version-check.png" alt="high-level-dia" className="imagewrapper"/>
+</p>
+
+Click `Save` and `NetBird Client Version` check will be enabled.
+<p>
+    <img src="/docs-static/img/how-to-guides/posture-check-netbird-version-enabled.png" alt="high-level-dia" className="imagewrapper"/>
+</p>
+
+Click `Continue` and fill out the form wil the following information and click `Create Posture Check` to save:
+- Name of the posture check: `Netbird Version`
+- Description: `Allow Netbird client with version 0.25.0 or greater`
+
+<p>
+    <img src="/docs-static/img/how-to-guides/posture-check-post-config.png" alt="high-level-dia" className="imagewrapper"/>
+</p>
+
 ### Adding posture check to policy
 ### Update posture check
 ### Delete posture check