Initial Dockerfile.

dotnet-build-server/Dockerfile

+FROM mcr.microsoft.com/dotnet/sdk:3.1-buster
+
+ARG BUILD_DATE
+ARG VCS_REF
+ARG VERSION
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name="dotnet SDK" \
+      org.label-schema.description="Docker image to build .NET core applications" \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vendor="University of Nebraska - Lincoln" \
+      org.label-schema.version="0.1.0" \
+      org.label-schema.schema-version="1.0" \
+      maintainer="Roger Feese <rfeese@nebraska.edu>"
+
+# Make sure that tools we need are installed
+RUN apt-get update \
+    && apt-get install git
+
+# sonarscanner (https://docs.sonarqube.org/latest/analysis/scan/sonarscanner-for-msbuild/)
+RUN dotnet tool install --global dotnet-sonarscanner
+RUN echo 'export PATH="$PATH:/root/.dotnet/tools"' >> ~/.bash_profile