If you're looking to set up a validator for Edgeware, you can find a helpful guide at https://main.edgeware.wiki/quickstart/set-up-a-validator. It's recommended that you have at least 2GB of RAM and use Ubuntu 18.04 x64. If you plan on running an archive node, keep in mind that the archive chain is over 100GB, so you'll need extra storage for chain growth. However, if you don't want to run an archive node, you can use the --pruning=1000 and --unsafe-pruning flags. Additionally, the Polkadot docs at https://wiki.polkadot.network/docs/maintain-guides-how-to-validate-polkadot can also be helpful.