slimmer dockerimage

Author: gambtho

vstsdocker/Dockerfile

@@ -1,29 +1,46 @@
-FROM ubuntu:16.04
+FROM debian:stretch-slim
 
-# To make it easier for build and release pipelines to run apt-get,
-# configure apt to not require confirmation (assume the -y argument by default)
-ENV DEBIAN_FRONTEND=noninteractive
+ENV DEBIAN_FRONTEND noninteractive
 RUN echo "APT::Get::Assume-Yes \"true\";" > /etc/apt/apt.conf.d/90assumeyes
 
 RUN apt-get update \
- && apt-get install -y --no-install-recommends \
-        software-properties-common \
- && apt-add-repository ppa:git-core/ppa \
- && apt-get update \
- && apt-get install -y --no-install-recommends \
-        apt-utils \
-        curl \
-        git \
-        unzip \
-        jq \
-        libcurl3 \
-        libicu55 \ 
-        libunwind8 \
-        netcat \
- && curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | bash \
- && apt-get install -y --no-install-recommends git-lfs \
- && rm -rf /var/lib/apt/lists/* \
- && rm -rf /etc/apt/sources.list.d/*
+    && apt-get install apt-utils -qq 
+
+RUN apt-get install -qq --no-install-recommends \
+    apt-transport-https \
+    ca-certificates \
+    curl \
+    file \
+    ftp \
+    jq \
+    git \
+    gnupg \
+    iproute2 \
+    iputils-ping \
+    locales \
+    lsb-release \
+    netcat \
+    sudo \
+    time \
+    unzip \
+    wget \
+    zip \
+&& rm -rf /var/lib/apt/lists/* && apt-get clean
+
+# Install dotnet sdk
+RUN wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.asc.gpg \
+    && mv microsoft.asc.gpg /etc/apt/trusted.gpg.d/ \
+    && wget -q https://packages.microsoft.com/config/debian/9/prod.list \
+    && mv prod.list /etc/apt/sources.list.d/microsoft-prod.list \
+    && apt-get update \
+    && apt-get -y install dotnet-sdk-2.1 \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /etc/apt/sources.list.d/* \
+    && apt-get clean
+
+ENV DOTNET_RUNNING_IN_CONTAINER=true \
+    DOTNET_USE_POLLING_FILE_WATCHER=true \
+    NUGET_XMLDOC_MODE=skip
 
 # Accept the TEE EULA
 RUN mkdir -p "/root/.microsoft/Team Foundation/4.0/Configuration/TEE-Mementos" \