add db3 network

[xuman2019]

For all PRs

• [X] I read the Contribution Guide

For new stacks

• [x] I followed the do's and don'ts
• [x] This stack does not already exist

[netlify[bot]]

👷 Deploy request for awesomestacks accepted.

Name	Link
🔨 Latest commit	cdb37021383ec1e65be1bb791ebc9ab9e68f0696
🔍 Latest deploy log	https://app.netlify.com/sites/awesomestacks/deploys/63d21b967a9b890008ba740e

[joshed-io]

@xuman2019 Thanks!