fix: omg thread in the right place

compose.yml

@@ -38,6 +38,7 @@ services:
       - DISABLE_FEDERATION
       - DOMAIN
       - LETSENCRYPT_HOST=${DOMAIN}
+      - STACK_NAME
       - SYNAPSE_ADMIN_EMAIL
       - SYNAPSE_REPORT_STATS=no
       - SYNAPSE_SERVER_NAME=${DOMAIN}
@@ -70,7 +71,6 @@ services:
       - POSTGRES_INITDB_ARGS="--encoding=UTF-8 --lc-collate=C --lc-ctype=C"
       - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
       - POSTGRES_USER=synapse
-      - STACK_NAME
     networks:
       - internal
     healthcheck: