bash -c "$(curl -sL https://raw.githubusercontent.com/MichMich/MagicMirror/master/installers/raspberry.sh)"

things go wrong like:

Downloading electron-v2.0.0-linux-arm.zip
Error: read ECONNRESET
/home/pi/MagicMirror/node_modules/electron/install.js:47
  throw err
  ^

Error: read ECONNRESET
    at TLSWrap.onread (net.js:602:25)
npm WARN grunt-stylelint@0.10.1 requires a peer of stylelint@^9.0.0 but none is installed. You must install peer dependencies yourself.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! electron@2.0.0 postinstall: `node install.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the electron@2.0.0 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/pi/.npm/_logs/2018-10-15T15_53_36_040Z-debug.log
Unable to install dependencies!

Delete MagicMirror folder to install again, still like this.
I have notice that other people are also getting trouble like this:
https://github.com/MichMich/MagicMirror/issues/1281

Please help!
Thanks