[Don't Merge] - Set Global Axios defaults

[kkomaz]

• I set the global axios defaults for fetching in the src/index.js.
• This will reduce the amount of boilerplate necessary when making axios request.
• When user pulls locally, they should have the option to keep as is, pro feature, or normal graphite features via below (src/index.js)

// src/index.js
const setAxiosHeaders = () => {
  // Default
  axios.defaults.baseURL = process.env.NODE_ENV === 'development' ? process.env.REACT_APP_API_URL_LOCAL : process.env.REACT_APP_API_URL_SOCKET

  // Local w/ sockets (PRO)
  // axios.defaults.baseURL = process.env.REACT_APP_API_URL_SOCKET

  // Local w/o sockets (Normal)
  // axios.defaults.baseURL = process.env.REACT_APP_API_URL_LOCAL
}

• Add two files .env and .env.sample. By default .env will be a git ignored file. .env.config.js will be added as github and SHOULD NOT contain sensitive data as it is exposed like public API KEYS.

• Updated the Readme on #4 to copy the env.config.js to .env

• Don't merge this in yet. I need to test this later tonight but putting in a PR to show the changes.

[kkomaz]

Also @jehunter5811

We MIGHT need to add/update the environment variables in NETLIFY to the ones I defined in the PR. Adding this comment for Record Keeping

[polluterofminds]

@kkomaz there are no env variables in netlify. I reviewed this and everything works great. However, I found other bugs and fixed those. I included them in branch you created and merged your changes and mine into pre-release