frontends: use new EXIT_BACKEND_NOT_FOUND exit code: - new EXIT_BACKEND_NOT_FOUND (5) is used when frontend can't find backend with the bridge. It differs from EXIT_BRIDGE_ERROR (3) which is used when something went wrong when connecting to backend. - use this exit code in quick app and in jp

This directory and subdirectories contain files to build and manage Docker images of Salut à Toi.

Please refer to documentation for details.