Update env file instructions

README.md

@@ -11,7 +11,7 @@ Just the usual:
 ```
 ansible-playbook playbook.yml
 ```
-Once the playbook has finished, open `/opt/greenlight/.env` and set the
+Once the playbook has finished, open `/root/bbb/env` and set the
 value of `DB_PASSWORD`.
 
 Also, place copies of `csclub-wildcard-chain.crt` and `csclub-wildcard.key`
@@ -46,6 +46,11 @@ UPDATE users SET role_id = 2 WHERE username = 'my_csc_username';
 
 When you log back in, you should now be an admin.
 
+## Editing the env file
+Whenever you edit /root/bbb/env, make sure to restart the greenlight container
+on xylitol with e.g. `systemct restart container-greenlight` and then run
+`podman exec greenlight bin/rake db:migrate`.
+
 ## Greenlight customization
 To ensure that future sysadmins automatically become Greenlight admins,
 create a new role called "sysadmin" from the org settings in Greenlight.