npm run deploy:ghpages in npm scripts deploys a demo build of the React client onto the github pages branch.
"deploy:ghpages": "rimraf build && cross-env REACT_APP_NODE_ENV=demo npm run build && gh-pages -d build"
In terminal gh-pages -d build pushes build folder in github pages branch.
Uses cross-env when building React to pass ENV - as it's compatible with windows dev environment as well.
##cross-env
cross-env (mentioned in yarn workspaces)
Run scripts that set and use environment variables across platforms
Most Windows command prompts will choke when you set environment variables with NODE_ENV=production like that. (The exception is Bash on Windows, which uses native Bash.) Similarly, there's a difference in how windows and POSIX commands utilize environment variables. With POSIX, you use: $ENV_VAR and on windows you use %ENV_VAR%.
cross-env makes it so you can have a single command without worrying about setting or using the environment variable properly for the platform. Just set it like you would if it's running on a POSIX system, and cross-env will take care of setting it properly.
see their README for more info
## Links