run ocis without notification server by default

set SMTP_SENDER by default

deployments/examples/ocis_full/ocis.yml

@@ -37,7 +37,7 @@ services:
       # email server (if configured)
       NOTIFICATIONS_SMTP_HOST: "${SMTP_HOST}"
       NOTIFICATIONS_SMTP_PORT: "${SMTP_PORT}"
-      NOTIFICATIONS_SMTP_SENDER: "${SMTP_SENDER}"
+      NOTIFICATIONS_SMTP_SENDER: "${SMTP_SENDER:-oCIS notifications <notifications@${OCIS_DOMAIN:-ocis.owncloud.test}>}"
       NOTIFICATIONS_SMTP_USERNAME: "${SMTP_USERNAME}"
       NOTIFICATIONS_SMTP_INSECURE: "${SMTP_INSECURE}"
       # make the registry available to the app provider containers