Make sure /app is always in sys.path (#234)

* Make sure /app is always in sys.path

* Add CHANGELOG entry

Author: Ben Dickinson

CHANGELOG.md

@@ -2,7 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
 - Switch to the `poetry-core` build backend ([#232](https://github.com/torchbox/django-pattern-library/pull/232))
+- Ensure the project root is on `sys.path` so tests etc. can be run in by Docker Compose ([#233](https://github.com/torchbox/django-pattern-library/issues/233), [#234](https://github.com/torchbox/django-pattern-library/pull/234))
 
 ## [1.0.1](https://github.com/torchbox/django-pattern-library/releases/tag/v1.0.1) - 2023-08-19
 

Dockerfile

@@ -7,6 +7,7 @@ RUN useradd --create-home dpl && \
     chown -R dpl:dpl /venv/ /app/
 
 ENV PATH=/venv/bin:/home/dpl/.local/bin:$PATH \
+    PYTHONPATH=/app/ \
     VIRTUAL_ENV=/venv/ \
     DJANGO_SETTINGS_MODULE=tests.settings.dev