docs: Updated getting started guide with webpack fix

[MrSimmmons]

trafficstars

• Fixed getting started quite to support the latest webpack changes
• Updated some code consistency

[MrSimmmons]

@brandondiamond https://github.com/CyborgSemon/material-components-guide-test npm i && npm start

[MrSimmmons]

One thing that I did find a little strange is why darkslamon is the colour of choice for the button customisation example. Since I was just copy pasting the getting stated code, I didint see that darkslamon was in there so when the dev server started up and the button had different colours to the button and button with ripple images, I thought something was broken. So maybe that should be changed as well? Idk

[MrSimmmons]

Also, I have no idea why those github tests have failed. All I changed was the markdown file

[anlexN]

can we solve PR?

[MrSimmmons]

Very outdated at this point. Closing