Improve Front-End performance

[anselmh]

I think front-end performance could be massively increased by a few tasks. Most of them can be handled by myself:

• Combine CSS to only 1 file or consider inlining it
• Serve minified CSS only in production
• Consider if all webfont styles are needed
• Add a few server rules (@yoavweiss should configure the server to run on these configs)
• Remove not needed CSS selectors
• Review JS for performance improvements
• Serve minified JS in production