Update menu here in the config.exs file in the block_scout_web directory. Changes carry over to both the footer and header links https://github.com/poanetwork/blockscout/blob/d164c35e02a1c75b94d93129422485245d22120d/apps/block_scout_web/config/config.exs#L24-L71​
Content moved from https://forum.poa.network/t/remove-other-networks-in-menu-in-nav-bar-using-docker/2101​