Setting a proxy for bower?

Question

linux

On firsvds vps, Ubuntu 16.04 OS, created a git user, installed git, npm, composer, bower.
I clone the project repository from git, install composer dependencies, then I want to install dependencies from bower, but I get an error:
bower search leads to ECONNREFUSED #1049
Googling found a solution, this is to specify a proxy in .bowerrc:

{
 "proxy": "http://user:[email protected]:port/" 
}

But here I don’t quite understand what should be in the role of a proxy so that dependencies from the bower turnip would be drawn? Raise a proxy server to access the bower repositories through it?
Explain to me what I need to do to make the bower work?