Update Dockerfile

Author: bwbohl

Dockerfile

@@ -26,8 +26,8 @@ USER root
 
 ADD https://downloads.apache.org/ant/binaries/apache-ant-${ANT_VERSION}-bin.tar.gz \
     https://github.com/Saxonica/Saxon-HE/releases/download/${SAXON_VERSION}/${SAXON_VERSION}J.zip \
-	https://www.oxygenxml.com/maven/com/oxygenxml/oxygen-patched-xerces/${XERCES_VERSION}/oxygen-patched-xerces-${XERCES_VERSION}.jar \
-	/tmp/
+    https://www.oxygenxml.com/maven/com/oxygenxml/oxygen-patched-xerces/${XERCES_VERSION}/oxygen-patched-xerces-${XERCES_VERSION}.jar \
+    /tmp/
 
 COPY ["index.js", "package.json", "package-lock.json*", "/opt/docker-mei/"]