chore: added missing installation info to readme and addded demo proj…

…ect link

Signed-off-by: Lukas Frey <[email protected]>

README.md

@@ -38,6 +38,10 @@ Artist would be the root resource, the other would be child resources.
 ### Supported relationships
 Currently we support **one-to-many** and **polymoprhic one-to-many** relationships only.
 
+### Demo Project
+To better understand how nested resources work and to troubleshoot any issues you might encounter, we've created a demo laravel project:  
+https://github.com/GuavaCZ/filament-nested-resources-demo
+
 ### Quick start
 
 In order to set up Nested Resources, you need to do these steps:
@@ -160,7 +164,7 @@ class ListArtists extends ListRecords
 }
 ```
 
-Now let`s create a new page which will be used to create child records. Let's create `CreateArtistAlbum` page inside `ArtistResource/Pages`:
+Now let\`s create a new page which will be used to create child records. Let's create `CreateArtistAlbum` page inside `ArtistResource/Pages`:
 
 ```php
 use Guava\FilamentNestedResources\Pages\CreateRelatedRecord;
@@ -170,6 +174,9 @@ class CreateArtistAlbum extends CreateRelatedRecord
 {
     use NestedPage;
 
+    // This page also needs to know the ancestor relationship used (just like relation managers):    
+    protected static string $relationship = 'albums';
+
     //
 }
 ```