#6569 Support IPAM gateway in version 3.x

[Anonymous]

Originally created by: rvernica

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

See [#6555]

Describe the solution you'd like

The documentation page sis it all:

Note: Additional IPAM configurations, such as gateway, are only honored for version 2 at the moment.

I would be nice to have a more complete support of IPAM/network in the compose file for version 3.x.

Describe alternatives you've considered

I've considered downgrading to version 2.x but it seems a step backward.