Move Apache off of port 80 and replace with React

[pleia2]

With React taking over the front page, we want to change the ports around a bit.

Apache for the Flask service needs to be moved to

React needs to be moved to port 80.

Documentation, example .env files and configurations will all need updates.

[pleia2]

Keeping this open for now, but as mentioned in #268 we're probably going to get rid of Flask, and we will still need a webserver (Apache? NGINX?) running on port 80, just serving the React files instead.