workaround bug kaniko with env PATH

Dockerfile

@@ -3,6 +3,7 @@ ENTRYPOINT ["/entrypoint.sh"]
 COPY entrypoint.sh \
      healthcheck.sh \
      /
+# Change export PATH. See https://github.com/GoogleContainerTools/kaniko/issues/748
 ENV CATALINA_HOME="/opt/tomcat" \
     PATH="${PATH}:/opt/tomcat/bin" \
     CATALINA_OPTS="-Dconfig.file=/etc/web-laboratory/application.conf -Dnet.spy.log.LoggerImpl=net.spy.memcached.compat.log.SunLogger" \