Setup new environment

This is a tutorial on how to setup a new environment. Let's call it beta.

1. Create new branch

master and develop should be at the same point, or at least there is no commits that affects database.
Check out a new branch called beta from master.

2. Add configs

Create src/js/config/beta.js based on src/js/config/prod.js
Create webpack-config/beta.js based on webpack-config/prod.js. Beta uses the same GA ID and Intercom ID with Production
Include beta in src/js/config/index.js and webpack.config.js

3. Update scripts

.circleci/config.yml: add beta's logic to the file. Similar to staging, it automatically deploys, whenever new changes are pushed to beta branch.
package.json: add build command for beta

4. Deploy

Push the new beta branch and let CircleCI do the rest

5. Post deploy

Check if all sites are working properly

6. Github

beta branch must be protected from now on.