content: ARG CODER_BASE_TAG=latest
  # Start from base image (built on Docker host)
  FROM coder-base:${CODER_BASE_TAG}
  
  # Install everything as root
  USER root
  
  # Install JDK (OpenJDK 8)
  RUN DEBIAN_FRONTEND="noninteractive" apt-get update -y && \
      apt-get install -y openjdk-11-jdk
  ENV JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64
  ENV PATH $PATH:$JAVA_HOME/bin
  
  # Install Maven
  ARG MAVEN_VERSION=3.6.3
  ARG MAVEN_SHA512=c35a1803a6e70a126e80b2b3ae33eed961f83ed74d18fcd16909b2d44d7dada3203f1ffe726c17ef8dcca2dcaa9fca676987befeadc9b9f759967a8cb77181c0
  
  ENV MAVEN_HOME /usr/share/maven
  ENV MAVEN_CONFIG "/home/coder/.m2"
  
  RUN mkdir -p $MAVEN_HOME $MAVEN_HOME/ref \
      && echo "Downloading Maven" \
      && curl -fsSL -o /tmp/apache-maven.tar.gz https://apache.osuosl.org/maven/maven-3/${MAVEN_VERSION}/binaries/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
      \
      && echo "Checking downloaded file hash" \
      && echo "${MAVEN_SHA512}  /tmp/apache-maven.tar.gz" | sha512sum -c - \
      \
      && echo "Unzipping Maven" \
      && tar -xzf /tmp/apache-maven.tar.gz -C $MAVEN_HOME --strip-components=1 \
      \
      && echo "Cleaning and setting links" \
      && rm -f /tmp/apache-maven.tar.gz \
      && ln -s $MAVEN_HOME/bin/mvn /usr/bin/mvn
  
  # Install Gradle
  ENV GRADLE_VERSION=6.7
  ARG GRADLE_SHA512=d495bc65379d2a854d2cca843bd2eeb94f381e5a7dcae89e6ceb6ef4c5835524932313e7f30d7a875d5330add37a5fe23447dc3b55b4d95dffffa870c0b24493
  
  ENV GRADLE_HOME /usr/bin/gradle
  
  RUN mkdir -p /usr/share/gradle /usr/share/gradle/ref \
      && echo "Downloading Gradle" \
      && curl -fsSL -o /tmp/gradle.zip https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-bin.zip \
      \
      && echo "Checking downloaded file hash" \
      && echo "${GRADLE_SHA512}  /tmp/gradle.zip" | sha512sum -c - \
      \
      && echo "Unziping gradle" \
      && unzip -d /usr/share/gradle /tmp/gradle.zip \
      \
      && echo "Cleaning and setting links" \
      && rm -f /tmp/gradle.zip \
      && ln -s /usr/share/gradle/gradle-${GRADLE_VERSION} /usr/bin/gradle
  
  ENV PATH $PATH:$GRADLE_HOME/bin
  
  # Set back to coder user
  USER coder
  