added hostname var in ohmyposh

ohmyposh/.config/ohmyposh/zen.toml

@@ -20,6 +20,13 @@ type = 'prompt'
 alignment = 'left'
 newline = true
 
+[[blocks.segments]]
+template = '{{ .HostName }} '
+foreground = 'magenta'
+background = 'transparent'
+type = 'text'
+style = 'plain'
+
 [[blocks.segments]]
 template = '{{ .Path }}'
 foreground = 'blue'