Single part at the root, COMPOSE_FILE in .env

copier.yml

@@ -4,9 +4,18 @@ _answers_file: .copier/infra.yml
 _envops:
   keep_trailing_newline: true
 
+layout:
+  type: str
+  help: Where the code lives
+  choices:
+    Parts in their own directories: parts
+    A single part at the root: single
+  default: parts
+
 parts:
   type: str
   multiselect: true
+  when: "{{ layout == 'parts' }}"
   help: Parts that live in their own directory with a docker-compose.yml and a Makefile
   choices:
     backend: backend