Merge pull request #136 from PrincipleStudios/infra/docker-build-improvements

Leverage official image to avoid Microsoft repos

Author: mdekrey

Dockerfile

@@ -1,13 +1,10 @@
-FROM ubuntu AS base
+FROM mcr.microsoft.com/powershell:lts-ubuntu-20.04 AS base
 RUN  apt-get update \
   && apt-get install -y wget apt-transport-https software-properties-common \
-  && wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
-  && dpkg -i packages-microsoft-prod.deb \
-  && rm packages-microsoft-prod.deb \
   && apt-get update \
   && add-apt-repository universe \
   && add-apt-repository ppa:git-core/ppa \
-  && apt-get install -y git powershell \
+  && apt-get install -y git \
   && apt-get clean
 RUN  git config --global user.email "[email protected]" \
   && git config --global user.name "Integration Testing" \