Develop

I used to get an error message on osx when running start.sh:
```
Running the web server on port 8008.
The server should now be accessible locally at: http://127.0.0.1:8008/
To access it from another connected computer, try the following address(es):
usage: grep [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]
	[-e pattern] [-f file] [--binary-files=value] [--color=when]
	[--context[=num]] [--directories=action] [--label] [--line-buffered]
	[--null] [pattern] [file ...]
```
this patch is meant to fix this without breaking it on linux