chore(backend): update template to v0.3.3

.copier/backend.yml

@@ -1,4 +1,4 @@
-_commit: v0.3.2
+_commit: v0.3.3
 _src_path: https://git.kotikot.com/templates/backend-python.git
 author_email: h@kotikot.com
 author_name: h

backend/docker-compose.yml

@@ -87,6 +87,7 @@ services:
         required: false
     environment:
       RUN_ENVIRONMENT: prod
+      TZ: ${TZ:-UTC}
     volumes:
       - ./backend/src:/app/src
       - ./backend/migrations:/app/migrations