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FROM openjdk:8-jre-alpine3.9
# Set the version of the gosu command and if needs to be, it can be modified at runtime
ENV GOSU_VERSION 1.10
# For building the image in a proxy environment if necessary
ARG HTTP_PROXY
ARG HTTPS_PROXY
ARG no_proxy
ENV HTTP_PROXY ${HTTP_PROXY}
ENV HTTPS_PROXY ${HTTPS_PROXY}
ENV http_proxy ${HTTP_PROXY}
ENV https_proxy ${HTTPS_PROXY}
ENV no_proxy 127.0.0.1,localhost,${no_proxy}
RUN \
# Put all the dependencies into this variable to easily install everything
DEPS="ca-certificates \
curl \
dpkg \
fastjar \
jq \
loksh \
bash \
netcat-openbsd \
openssl \
shadow \
util-linux \
wget" \
&& apk add --no-cache ${DEPS} \
# need fastjar for some projects to update app's jar on container restart
&& ln -snf /usr/bin/fastjar $JAVA_HOME/bin/jar \
# Get the dpkg to properly download and install that version compatible to install GOSU on the image
&& dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
# Downloads the gosu command based on the dpkg version and gosu version supplied
&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch" \
# Use GPG to install the gosu application locally
&& chmod +x /usr/local/bin/gosu
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