Create README.md

Apps/Grav/README.md

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+# CasaOS Dockerized Grav
+---
+```md
+> Grav is a free software, self-hosted content management system (CMS) written in the PHP programming language and based on the Symfony web application framework. It uses a flat file database for both backend and frontend.
+
+Grav is designed to have a shallow learning curve, and to be easy to set up. The focus of Grav is speed and simplicity, rather than an abundance of built-in features that come at the expense of complexity.
+```
+```md
+# How To Use The App & or What's Included If Basic App
+1.) Simply Install it.
+```
+---
+
+### Ports Used
+```md
+> | 80:80 |  
+```
+---
+
+### Volumes Used
+```yaml
+    volumes:
+      - type: bind
+        source: /DATA/AppData/grav/config
+        target: /config
+```
+> Explanation on how To change the source that data will be saved | say your storage is called `Storage1` and it is located on `/mnt` this would mean you would change 
+```yaml
+        source: /DATA/AppData/grav/config
+```
+> To
+```yaml
+        source: /mnt/Storage1/DATA/AppData/grav/config
+```