ConfigureExit allows to overwrite the used os.Exit function.

CriticalError handles a critical error, prints a message and exists the application with a error code.

Error handles an error, prints a message and sends syscall.SIGTERM signal to teardown the application.

GetSignalChannel returns the signal channel registered for notifications about syscall.SIGINT and syscall.SIGTERM.

GetStartTime provides the start time of the application.