Make all pages MDX compliant + added logo back

pages/client/changelog.mdx

@@ -113,17 +113,17 @@ title: 'Changelog'
 
 # Version 4.2.5
 
-::alert{type="warning"}
+<Warning>
 This release requires a new version of simple-proxy: 2.1.3
-::
+</Warning>
 
 - Update provider package, with fixes for febbox-mp4
 
 # Version 4.2.4
 
-::alert{type="warning"}
+<Warning>
 This release requires a new version of simple-proxy: 2.1.1
-::
+</Warning>
 
 - Add meta tag for PWA's for apple devices
 - Add galician flag
@@ -221,9 +221,9 @@ This release requires a new version of simple-proxy: 2.1.1
 
 # Version 4.0.0
 
-::alert{type="info"}
-If you are upgrading from a previous version, make sure to read [the upgrade guide](5.upgrade.md).
-::
+<Note>
+If you are upgrading from a previous version, make sure to read [the upgrade guide](./upgrade.mdx).
+</Note>
 
 ### Bug fixes