Check for server.jar on startup of script about minecraft-server-hibernation HOT 3 CLOSED

I just quickly through something together because I needed this in the Docker branch for testing.
Has to be adjusted for usage of the config file and maybe cleaned up a bit.

	// Check if MC server file exists at chosen location
	if mcPath[len(mcPath)-1:] != "/" {
		logger("Path without last \"/\". Adding...")
		mcPath = mcPath + "/"
	}
	mcFilePath := mcPath + mcFile
	logger("mcFilePath: " + mcFilePath)
	if _, err := os.Stat(mcFilePath); err != nil {
		if os.IsNotExist(err) {
			logger("MC server file not found.")
                        os.Exit(1)
		}
	} else {
		logger("MC server file found.")
	}

Oh, and maybe this is Linux specific...
Gotta check the os.Stat() definition.

Also, adding / is definitely linux specific. For Windows one would need to add \

from minecraft-server-hibernation.

added in bc373ba

from minecraft-server-hibernation.

Changed to encompass the file and not only the folder in 05c9958

from minecraft-server-hibernation.