docs: update the doc of makefile target with lint_perltidy (#8883)

Co-authored-by: Alex Garel <alex@garel.org>

docker/README.md

@@ -35,4 +35,10 @@ See also [targets to run tests](../docs/dev/how-to-write-and-run-tests.md#runnin
 | `make clean`              | Clean up your dev environment: removes locally bound folders, run `hdown` and `prune`. | Run `make dev` to recreate a fresh dev env afterwards.        |
 | `make import_sample_data` | Load sample data (~100 products) into the MongoDB database.                            |                                                               |
 | `make import_prod_data`   | Load latest prod data (~2M products, 1.7GB) into the MongoDB database.                 | Takes up to 10m. Not recommended for dev setups !             |
+| `make lint`      | Indent and reformat your code[^lint]                       |
+
+[^lint]: If you are having permission issues with `make lint` try writing the following commands :
+`export MSYS_NO_PATHCONV=1
+docker-compose run --rm --no-deps -u root backend chown www-data:www-data -R /opt/product-opener/`
+then run again `make lint` and you should be good to go