Add primary domain setting

.env.example

@@ -1,3 +1,4 @@
+PRIMARY_DOMAIN=kosmos.org
 AKKOUNTS_DOMAIN=accounts.example.com
 
 SMTP_SERVER=smtp.example.com
@@ -9,13 +10,13 @@ SMTP_DOMAIN=example.com
 SMTP_AUTH_METHOD=plain
 SMTP_ENABLE_STARTTLS=auto
 
-REDIS_URL='redis://localhost:6379/1'
-
 LDAP_HOST=localhost
 LDAP_PORT=389
 LDAP_ADMIN_PASSWORD=passthebutter
 LDAP_SUFFIX='dc=kosmos,dc=org'
 
+REDIS_URL='redis://localhost:6379/1'
+
 WEBHOOKS_ALLOWED_IPS='10.1.1.163'
 
 DISCOURSE_PUBLIC_URL='https://community.kosmos.org'