dockerize front-end and pass env vars to npm build (#614)

* Revert "dockerize front end (#558)"

This reverts commit 89c23faf7a.

* dockerize frontend
- adds score server and website docker compose
- creates docker ignore
- adds .env.* for dev, prod and local
- adds dockerfile for website
- adds env to gatsby-config
- adds hostaddress to develop / start script
- adds istructions in README for running docker
- replaces fixed URLS with ones based on env vars
- creates a score server dockerfile

* updates README to change map tiles source

* adds env DATA_SOURCE:development to deploy GHA

* capitalize readme

client/gatsby-config.js

@@ -1,3 +1,7 @@
+require('dotenv').config({
+  path: `.env.${process.env.DATA_SOURCE}`,
+});
+
 module.exports = {
   siteMetadata: {
     title: 'Justice40',