Fix issue of symbols not displaying in Linux
Fix issue of symbols not displaying in Linux

The symbols would not display in the status bar due to missing
fonts by default in the Docker container. This fix adds the
dependency described in #505

Fixes #505

machawk1/wail,machawk1/wail,machawk1/wail,machawk1/wail,machawk1/wail,machawk1/wail,machawk1/wail,machawk1/wail