You know where these should go.
xcode-select --install
Installs brew from https://brew.sh/
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Add brew packages from brew.txt
xargs brew install < brew.txt
Install the node version manager https://github.com/creationix/nvm
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash