Docs: Update the Podman Desktop docs for macOS

In order to access our custom seccomp policy, we require it to be
mounted on the podman machine.

docs/podman-desktop.md

@@ -12,7 +12,16 @@ You will be required to open a terminal and follow these steps:
 
 ## On macOS
 
-To set the container runtime to podman, use this command:
+You will need to configure podman to access the shared Dangerzone resources:
+
+```bash
+podman machine stop
+podman machine rm
+podman machine init -v /Applications/Dangerzone.app:/Applications/Dangerzone.app
+podman machine set --rootful=false  
+podman machine start
+```
+Then, set the container runtime to podman using this command:
 
 ```bash
 /Applications/Dangerzone.app/Contents/MacOS/dangerzone-cli --set-container-runtime podman