Do you have any expertise on any of this languages? If you don't go for Python or Ruby. Very easy to learn languages, short step curse. If you do, just choose the language that you know to code in, and a framework.
Do you want to code in one language? Go for NodeJs, when programming client side you will need Js too.
If you let me advise you, I'll go with Python/Flask.
If you are a really a beginner on this and you know PHP, you should try CodeIgniter.