posty serve command

[nickpegg]

Add a CLI command like posty serve to fire up a HTTP web server to display the contents of the build output. Can likely use Python's built-in SimpleHTTPServer for this.

Needs to fiddle with site config to modify base URL to be the URL that the server is listening on, e.g. http://localhost:5000/.

Bonus points for running build and refreshing the page on a file change.

[nickpegg]

Looks like refreshing will be easier than expected: https://pypi.org/project/livereload/

You give it a dir to serve, a dir to watch, and a function to call when the watch dir changes and magic!