Post-creation README

[grtjn]

Current README spells out how to use the vue-template without grove-cli, but that is only relevant when creating a new project. After that you need a different README.

[grtjn]

A PM2 related section would be nice for instance:

Installing PM2

It is recommended to use PM2 to host your Node.js middle-tier with front-end for production. You'll need to install PM2 globally using npm, and configure it as a OS-level service:

npm install -g pm2

For recent RedHat/CentOS, Ubuntu, Arch, and Debian environments:

pm2 startup systemd --no-daemon

For Windows environments:

npm install -g pm2-windows-service
pm2-service-install

For additional options, like running as non-root and such, see: https://pm2.io/doc/en/runtime/guide/startup-hook/

[grtjn]

(mental note: good example in wsl project)