Curriculum: Add explanation for npm init command with and without the -y flag (read all comments for direction)

[oubawaleh]

To pre-populate the package.JSON with some basic information.

[judytuna]

Context: npm init without the -y flag makes you enter a tiny command-line program that asks you for details for your package.json. We can skip those steps by using -y. (Users were getting confused and trying to type npm install --save express into the npm init prompt!)

Also add some info about what npm init is doing (which is just writing up a package.json for you)

[alodahl]

Which topic outline do you think this would best fit into? @judytuna @oubawaleh

[judytuna]

Perhaps as a note after the "use npm to create a package.json file" section of the node.js lab exercise part 2

https://github.com/Techtonica/curriculum/blob/master/node-js/node-lab-exercise-part-2.md#part-2---use-npm-to-create-a-packagejson-file

[yati1998]

@oubawaleh I would like to work on this? Can I?

[alodahl]

@yati1998 Thanks for offering, but you can only work on one issue at a time.

[pydevsg]

@alodahl I would like to work on this issue under GSSoC 2019, can I?

[Soumya0803]

@alodahl Can I work on this issue?

[alodahl]

Thanks anyway @Soumya0803 , please choose another issue 🙂

[yati1998]

Hey, Can I work on this issue?