Add docs

README.md

@@ -61,6 +61,7 @@ The JSON configuration uses the following top-level fields:
 | `tabs`                       | Array (Required)                                  | Titles and URLs of tabs for this app                                 |
 | `windowed`                   | Boolean (Optional, default `false`)               | Start the app with each tab in its own window                        |
 | `alwaysNotify`               | Boolean (Optional, default `false`)               | Show macOS notifications even if your app is currently focused       |
+| `alwaysOnTop`                | Boolean (Optional, default `false`)               | Position this app's window on top of all others                      |
 | `openNewWindowsWith`         | String (Optional, macOS 10.15+)                   | Override system default browser for external links — value is a _bundle identifier_ like `com.apple.Safari`, `com.google.Chrome`, or `com.mozilla.firefox` |
 | `openNewWindowsInBackground` | Boolean (Optional, default `false`, macOS 10.15+) | Determines if browser app becomes active when opening external links |
 
@@ -112,6 +113,7 @@ Here's a fancier example that uses the optional fields referenced above:
   ],
   "windowed": true,
   "alwaysNotify": true,
+  "alwaysOnTop": true,
   "openNewWindowsWith": "com.apple.Safari",
   "openNewWindowsInBackground": true
 }