Update instructions for installing on WIndows
Update instructions for installing on WIndows

* Updated the line about copying the default
  config for `vue-storefront-api`.
* Fixed a copy and paste typo in step 6 for installing `vue-storefront`.

pkarw/vue-storefront,pkarw/vue-storefront,DivanteLtd/vue-storefront,DivanteLtd/vue-storefront,DivanteLtd/vue-storefront,pkarw/vue-storefront,patrykpiston/vue-storefront,pkarw/vue-storefront,patrykpiston/vue-storefront,DivanteLtd/vue-storefront