Other than the official documentation, community members have written several guides that are at various stages of up-to-dateness. We provide these for your use- many of their writers are available at the Edgeware Discord. We'll attempt to update this. Have one to share? Let us know in our Discord.
Luke Schoens' Validation Setup Guide for Edgeware Nodes (updated for Edgeware Betanet release ( v.0.8, Sept 15 2019)
Testnet Validation by Ambroid of Zee Prime Capital