Set (sub)domain name via environment
diff --git a/TODO.on.site b/TODO.on.site
index 39983d4..3c680a9 100644
--- a/TODO.on.site
+++ b/TODO.on.site
@@ -5,9 +5,7 @@
 * docker-compose -f sourcearcade.yml build --build-arg SELFSIGNED_REQ_HOST=hostname
   - same build-args!
 
-Adapt checked in files:
-* Set server_name in `nginx/sa.conf`
-* Set SIMPLEID_BASE_URL in `simpleid/www/config.php`
-* Make sure identities point to the right URL
+Create environment files (cf. `git ls-files \*environment.template`):
+* Set SA_PUBLIC_DOMAIN_NAME in `environment`
 * Set CANONICAL_WEB_URL in `gerrit/environment`
 * Enable GitHub OAUTH in `gerrit/environment`