Blogsh script is great !
But if you do not have bash installed (aka you are a windows developer) will be of no use for you.
But the script is fairly easy to read and understand.
Basically, you don't have to do anything to have a production ready application. Just upload to your hosting all the files (including symfony's files and you are ready to go)
Just some notes to...
There are things that you don't need to upload and blogsh script does a good work erasing them.
the content of app/logs folder do not need to be uploaded
the content app/cache folder do not need to be uploaded
if you have .git folders (ususally hidden folders) do not need to be uploaded
the important folders are: vender, src, app and web.
Just one more note.. you should configure the document root of your hosting to point to web folder. But some providers have it hardcoded to http_public or something like that and you can't change it.
If that's your case, just rename web folder for http_public or whatever your hosting have configured.
good luck !