Merge pull request #2 from heuermh/master

remove unnecessary env

Author: heuermh

maven3-openjdk8-alpine/Dockerfile

@@ -3,7 +3,6 @@ FROM openjdk:8-jdk-alpine
 RUN apk add --no-cache curl tar bash procps
 
 ARG MAVEN_VERSION=3.6.0
-ARG USER_HOME_DIR="/root"
 ARG SHA=fae9c12b570c3ba18116a4e26ea524b29f7279c17cbaadc3326ca72927368924d9131d11b9e851b8dc9162228b6fdea955446be41207a5cfc61283dd8a561d2f
 ARG BASE_URL=https://apache.osuosl.org/maven/maven-3/${MAVEN_VERSION}/binaries
 
@@ -14,5 +13,3 @@ RUN mkdir -p /usr/share/maven \
   && rm -f /tmp/apache-maven.tar.gz \
   && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
 
-ENV MAVEN_HOME /usr/share/maven
-ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"