Switch docker-compose to dev settings

docker/docker-compose.yml

@@ -5,16 +5,11 @@ x-takahe-common:
     build: .
     image: takahe:latest
     environment:
-      DJANGO_SETTINGS_MODULE: takahe.settings.production
+      DJANGO_SETTINGS_MODULE: takahe.settings.development
       PGHOST: db
       PGDATABASE: takahe
       PGUSER: postgres
       PGPASSWORD: insecure_password
-      TAKAHE_SECRET_KEY: insecure_secret
-      TAKAHE_MAIN_DOMAIN: example.com
-      TAKAHE_EMAIL_CONSOLE_ONLY: "true"
-      TAKAHE_MEDIA_BACKEND: local
-      TAKAHE_AUTO_ADMIN_EMAIL: admin@example.com
     networks:
       - external_network
       - internal_network