[docs] Added devbox global push docs page (#1414)

## Summary
title say it.

## How was it tested?
N/A

Author: mohsenari

docs/app/docs/cli_reference/devbox_global_push.md

@@ -0,0 +1,19 @@
+# devbox global push
+
+Push a [global] config. Leave empty to use jetpack cloud. Can be a git repo for self storage.
+
+```bash
+devbox global push <git-repo> [flags]
+```
+
+## Options
+
+<!-- Markdown Table of Options -->
+| Option | Description |
+| --- | --- |
+| `-h, --help` | help for pull |
+| `-q, --quiet` | suppresses logs |
+
+## SEE ALSO
+
+* [devbox global](devbox_global.md)	 - Manages global Devbox packages