Add slack variables to docker-compose

docker-compose.yml

@@ -51,6 +51,9 @@ services:
       # - OIDC_IGNORE_USERNAME=true
       # - OIDC_IGNORE_ROLES=true
       # - OIDC_ENFORCED=true
+
+      # - SLACK_BOT_TOKEN=xoxb-xxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxx
+      # - SLACK_CHANNEL_ID=xxxxxxxxxx
     depends_on:
       postgres:
         condition: service_healthy