domains used in proxies aren't added to LAGOON_ROUTES

[tobybellwood]

If I specify a route in a proxy, it doesn't flow through to the LAGOON_ROUTES variable inside the container, so doesn't appear in the trusted (and error with The provided host name is not valid for this server.

i.e. given the lando.yml

name: drupal8-example-advanced
recipe: lagoon
config:
  flavor: drupal
  build:
    - composer install
proxy:
  nginx:
    - myapp.lndo.site:8080

we get

Here are some vitals:

 NAME          drupal8-example-advanced                                           
 LOCATION      /home/tobybellwood/sites/drupal-example-simple                     
 SERVICES      cli, nginx, php, mariadb, redis, solr, varnish, mailhog, lagooncli 
 NGINX URLS    http://localhost:49158                                             
               http://myapp.lndo.site/                                            
               https://myapp.lndo.site/                                           
 SOLR URLS     http://localhost:49154                                             
 VARNISH URLS  http://localhost:49159                                             
               http://varnish.drupal8-example-advanced.lndo.site/                 
 MAILHOG URLS  http://localhost:49156                                             
               http://inbox.drupal8-example-advanced.lndo.site/                   

tobybellwood@pop-os:~/sites/drupal-example-simple  $ lando ssh
[drupal8-example-advanced]cli-drupal:/app$ printenv | grep ROUTES
LAGOON_ROUTES=cli,nginx,php,mariadb,redis,solr,varnish,drupal8-example-advanced.lndo.site,localhost