ghost: add page (#4083)

Co-authored-by: Starbeamrainbowlabs <sbrl@starbeamrainbowlabs.com>
Co-authored-by: Zlatan Vasović <zlatanvasovic@gmail.com>

pages/common/ghost.md

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+# ghost
+
+> A blogging platform and headless CMS.
+> More information: <https://ghost.org>.
+
+- Install Ghost in the current directory:
+
+`ghost install`
+
+- Start an instance of Ghost:
+
+`ghost start`
+
+- Restart the Ghost instance:
+
+`ghost restart`
+
+- Check the system for any potential hiccups when on install or update of Ghost:
+
+`ghost doctor`
+
+- View the logs of a Ghost instance:
+
+`ghost log {{name}}`
+
+- Run a Ghost instance directly (used by process managers and for debugging):
+
+`ghost run`
+
+- View running Ghost processes:
+
+`ghost ls`
+
+- View or edit Ghost configuration:
+
+`ghost config {{key}} {{value}}`