bugfix bad parameter for application

backend/docker-compose.yml

@@ -21,7 +21,7 @@ services:
       - "redis"
     environment:
       setup_done: "false"
-      setup_admin_user: "${setup_admin_email}"
+      setup_admin_email: "${setup_admin_email}"
       setup_admin_password: "${setup_admin_password}"
       db_uri: "postgres://postgres:${POSTGRES_PASSWORD}@db/postgres"
       WEB2PY_PASSWORD: "${setup_admin_password}"