Seperate nginx into a single container

[mortezamirkar]

• decrease the Misp-core image size
• Better for debugging
• Better builds
• less build complexity
  and a lots of other things

[mortezamirkar]

@ostefano what do thing about this idea?

[ostefano]

Separation is good.

[pascaliske]

Hi @ostefano / Hi @mortezamirkar,

I had nearly the same thoughts on separating nginx from core and just saw your issue here.
If you have some time, please have a look at my PR - I would highly appreciate some feedback!

Thanks!