Dockerfile

ARG VARIANT=11
FROM mcr.microsoft.com/vscode/devcontainers/java:${VARIANT}

# Allow to use the VARIANT after FROM
ARG VARIANT

# [Optional] Install Maven or Gradle
ARG INSTALL_MAVEN="false"
ARG MAVEN_VERSION=3.6.3
ARG INSTALL_GRADLE="false"
ARG GRADLE_VERSION=5.4.1
RUN if [ "${INSTALL_MAVEN}" = "true" ]; then su vscode -c "source /usr/local/sdkman/bin/sdkman-init.sh && sdk install maven \"${MAVEN_VERSION}\""; fi \
    && if [ "${INSTALL_GRADLE}" = "true" ]; then su vscode -c "source /usr/local/sdkman/bin/sdkman-init.sh && sdk install gradle \"${GRADLE_VERSION}\""; fi

# [Optional] Install a version of Node.js using nvm for front end dev
ARG INSTALL_NODE="true"
ARG NODE_VERSION="lts/*"
RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "source /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi

# Install the lost package `fontconfig` for VARIANT 11
RUN if [ "${VARIANT}" = "11" ]; then \
    apt-get update && export DEBIAN_FRONTEND=noninteractive \
    && apt-get -y install --no-install-recommends fontconfig; fi

# [Optional] Uncomment this section to install additional OS packages.
# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
#     && apt-get -y install --no-install-recommends <your-package-list-here>

# [Optional] Uncomment this line to install global node packages.
# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1