[APP] Invoice Ninja - Add installation notice in description.md

apps/invoice-ninja/config.json

@@ -35,7 +35,7 @@
     },
     {
       "type": "text",
-      "label": "Invoice Ninja Application Key (Must be generated with the following command `docker run --rm -it invoiceninja/invoiceninja php artisan key:generate --show`)",
+      "label": "Invoice Ninja Application Key (cf. Installation Notice in Readme)",
       "required": true,
       "env_variable": "INVOICE_NINJA_APP_KEY"
     }

apps/invoice-ninja/metadata/description.md

@@ -1,3 +1,13 @@
+## Installation Notice
+
+## Initial Setup
+1. Generate an API Key using the following command:
+    ``` 
+    docker run --rm -it invoiceninja/invoiceninja php artisan key:generate --show 
+    ```
+2. Paste the generated key to `Invoice Ninja Application Key` in the Tipi UI.
+
+---
 <p align="center">
     <img src="https://raw.githubusercontent.com/hillelcoren/invoice-ninja/master/public/images/round_logo.png" alt="Sublime's custom image"/>
 </p>