config changes for automated deployment

1. add a path prefix to the build in order to deploy on github pages
2. more importantly, use the CDN tiles, at least for now.

client/gatsby-config.js

@@ -18,7 +18,7 @@ module.exports = {
     image: '/static/favicon.ico',
     siteUrl: process.env.SITE_URL || 'http://localhost:8000',
   },
-  pathPrefix: process.env.PATH_PREFIX || '',
+  pathPrefix: process.env.PATH_PREFIX || 'j40-cejst-2',
   plugins: [
     {
       resolve: 'gatsby-plugin-sass',

docker-compose.yml

@@ -37,7 +37,7 @@ services:
     environment:
       # See the client readme for more info on environment variables:
       # https://github.com/usds/justice40-tool/blob/main/client/README.md
-      DATA_SOURCE: local
+      DATA_SOURCE: cdn
       TZ: America/Los_Angeles
     volumes:
       - ./client/src:/client/src