Add support for copyright metadata in debian packages

[barthisrael]

Is your feature request related to a problem? Please describe.

It is a feature request. I would like to be able to add the debian/copyright metadata into the deb package through nFPM. This is how that file usually looks like:

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Files: *
License: Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do
eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad
minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex
ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est
laborum.
X-License-Url: https://www.mywebsite.com/mylicense
Sources: https://www.mywebsite.com/mytool
Copyright: mycopyright
Upstream-Name: mypackage

Describe the solution you'd like

Some way of specifying through the yml file that the copyright metadata should be present in the deb package.

Describe alternatives you've considered

So far we are working around by:

• generating the packages through nFPM
• unpacking
• including the debian/copyright
• repacking

Search

• I did search for other open and closed issues before opening this.

Code of Conduct

• I agree to follow this project's Code of Conduct

Additional context

No response

[barthisrael]

I forgot to mention it earlier here, but we worked around this issue by creating the copyright file and then specifying the following in our nFPM configuration file:

- src: build/copyright
  dst: /usr/share/doc/<product_name>/copyright
  packager: deb

[caarlos0]

I think that's a good enough alternative, might be worth adding it to our docs though