fix: fix LD_PRELOAD env.

Author: liqiang-fit2cloud

installer/Dockerfile-base

@@ -31,7 +31,7 @@ RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
     chmod g+xr /usr/bin/ld.so && \
     chmod g+x /usr/local/bin/python* && \
     apt-get clean all && \
-    echo "/usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2" > /etc/ld.so.preload
+    echo "/usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2" > /etc/ld.so.preload && \
     rm -rf /var/lib/apt/lists/* /usr/share/doc/* /usr/share/man/* /usr/share/info/* /usr/share/locale/* /usr/share/lintian/* /usr/share/linda/* /var/cache/* /var/log/* /var/tmp/* /tmp/*
 COPY --from=vector-model --chmod=700 /opt/maxkb-app/model /opt/maxkb-app/model