CLI don't check if directory in parameter exists

[pacome35220]

I'm submitting a ... (check one with "x")

[x] bug report => search github for a similar issue or PR before submitting
[ ] feature request

Scope (check one with "x")

[ ] <root>
[x] @zetapush/cli
[ ] @zetapush/client
[ ] @zetapush/cometd
[ ] @zetapush/common
[ ] @zetapush/core
[ ] @zetapush/create
[ ] @zetapush/http-server
[ ] @zetapush/platform-legacy
[ ] @zetapush/testing
[ ] @zetapush/troubleshooting
[ ] @zetapush/user-management
[ ] @zetapush/worker

Current behavior

zeta run --front mdr --serve-front don't throw error
zeta run --worker mdr throw error, but when calling open(2) syscall on the .zetarc file
same with zeta push

Expected behavior

CLI should check if directories exist before doing anything.
When deploying without front directory, CLI just don't expose front URL (logic), but without telling me that it's because there is no front directory.

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

• Operating System:
• Node Version: X.Y.Z
• Npm Version: X.Y.Z
• @zetapush/* Version: 0.37.1