Fix syntax of v1.4.2 environment variable

CHANGELOG

-v1.4.1 2002-02-10
+v1.4.3 2020-05-22
+-----------------
+Fix iconv() notices
+
+v1.4.1 2020-02-10
 -----------------
 Force update to update to composer version 1.9.3
 

Dockerfile

@@ -117,7 +117,7 @@ RUN echo 'hosts: files dns' > /etc/nsswitch.conf && \
 
 ADD bin/* /usr/local/bin/
 
-ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so php
+ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so
 ENV LAKEDROPS_DEV_DC_OPTIONS "-T"
 
 ENTRYPOINT ["docker-entrypoint.sh"]