Create user with id 1000 in the dockerfile

Author: ChrisLovering

Dockerfile

@@ -26,6 +26,9 @@ RUN --mount=type=cache,target=/root/.cache/uv \
 
 FROM python:$python_version
 
+# Create user 1000 so that the runAsUser has a username
+RUN useradd kingarthur -u 1000
+
 # Set Git SHA environment variable for Sentry
 ARG git_sha="development"
 ENV GIT_SHA=$git_sha