chore: Create non-root user in Dockerfile

Dockerfile

@@ -13,6 +13,15 @@ COPY src/ ./src/
 
 RUN pip3 install -r requirements.txt
 
+# Create a non-root user and group
+RUN addgroup --system streamlituser && adduser --system --group streamlituser
+
+# Change ownership of the working directory to the new user
+RUN chown -R streamlituser:streamlituser /app
+
+# Switch to the new non-root user
+USER streamlituser
+
 EXPOSE 8501
 
 HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health