Fix Dockerfile permissions for K8s execution

Make .gradle, output, build, and modules directories writable (chmod 777)
so the container works when K8s runs it as a non-root user.

Dockerfile

@@ -50,21 +50,12 @@ RUN mkdir -p /app/modules
 # Test a simple module generation to ensure Synthea works
 RUN ./run_synthea -p 1 -m hypertension
 
-# Set up a symlink from mounted modules to Synthea modules directory
-RUN echo '#!/bin/sh\n\
-# Update modules symlinks\n\
-# Load environment variables\n\
-if [ -f /app/.env ]; then\n\
-  export $(grep -v "^#" /app/.env | xargs)\n\
-fi\n\
-\n\
-exec "$@"' > /app/entrypoint.sh && chmod +x /app/entrypoint.sh
+# Make directories writable for K8s (may run as non-root)
+RUN chmod -R 777 /app/.gradle /app/output /app/build /app/modules \
+    /app/src/main/resources/modules
 
 # Set PYTHONPATH to ensure modules can be found
 ENV PYTHONPATH="/app"
 
-# Set entrypoint to use our script
-ENTRYPOINT ["/app/entrypoint.sh"]
-
 # Default command when container runs
 CMD ["tail", "-f", "/dev/null"]