This resource adds GTAO style player blip/icon to streamed in players. Their icon will be removed when they stream out.
You can change the color of player blips by setting blipColor using Entity::data or Entity::setVariable on serverside. For a list of blip colors, visit the wiki page about blips.
Put playerblips into your server's client_packages directory, then add require('playerblips'); to index.js.