Create user and set up permissions

Dockerfile

@@ -25,7 +25,7 @@ RUN pip install --no-cache-dir --default-timeout=300 -r requirements.txt
 COPY . /app
 
 # Create user and set up permissions
-RUN useradd -m -u 1000 appuser && \
+RUN useradd -m appuser && \
     mkdir -p /app/logs /app/reports && \
     chown -R appuser:appuser /app && \
     chmod -R 755 /app && \