fix(docs): update zeit now deployment process considering v2

[franciscobrba]

Now is currently on version 2, and it use that version by default when someone want to make a deploy, then it let us two choices:

• A) Maintain current docs about v1 deployment but set version on example JSON.
• B) Update docs considering the the advent of v2 (11/2018)

I choose option B, then i made the changes and just commit it.

Before

After

Reasons to try to contribute

• Docs need to be always updated :)

Refs

ZEIT - Now about Vue.js deployment (v2)

Sorry my english, only a Brazilian servant.

[LinusBorg]

Possible duplicate with #3560

[franciscobrba]

Possible duplicate with #3560

To work right must exists a "now-build" script on package.json #3560 don't have this warn/instruction.

[Virgiel]

I think you are right to use the option B as I see no reason not to get the advantage of now 2 with a vue project

[Virgiel]

Now CLI has just reached version 14.2.0 and the aliasing commands has changed

now build and give a default alias
now --target production build and give alias from the config

more information at https://zeit.co/blog/automatic-aliasing

[NataliaTepluhina]

Thank you for working on this! Unfortunately, need to close the PR in favor of #4232