There are several ways to install pnpm. I prefer using
npm because I already have it installed and it fits in with all the other
global packages I have installed.
npm install --location=global pnpm@7.13.4The --location flag tells npm to install it as a global package, rather
than as part of my current project.
The @7.13.4 tacked onto the end of the pnpm package name is how I specify
the version of the package I am interested in.