refactor dockerfile 3 fix permission user non root

Dockerfile

@@ -26,7 +26,7 @@ RUN set -ex \
              /app/ml-models/tinybert-disaster-tweet \
              /app/ml-models/vit-human-pose-classification \
     && chown -R appuser:appgroup /app/ml-models \
-    && chmod -R u+w /app/ml-models
+    && chmod -R u+w /app/ml-models \
     && apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*