Added docker

SimplePackage/dockerfile

@@ -0,0 +1,45 @@
+FROM mcr.microsoft.com/dotnet/sdk:8.0-jammy AS build
+ARG BuildVersion
+ARG PACKAGETEST_FEED_URL
+ARG READ_NUGET_PAT
+ARG READ_NUGET_USER
+ARG BuildUniqueID
+LABEL build.uniqueid="${BuildUniqueID:-1}"
+RUN wget -qO- https://raw.githubusercontent.com/Microsoft/artifacts-credprovider/master/helpers/installcredprovider.sh | bash
+# Optional: Sometimes the http client hangs because of a .NEt issue. Setting this in dockerfile helps 
+ENV DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0
+# Environment variable to enable seesion token cache. More on this here: https://github.com/Microsoft/artifacts-credprovider#help
+ENV NUGET_CREDENTIALPROVIDER_SESSIONTOKENCACHE_ENABLED true
+
+# Environment variable for adding endpoint credentials. More on this here: https://github.com/Microsoft/artifacts-credprovider#help
+# Add "FEED_URL" AND "PAT" using --build-arg in docker build step. "endpointCredentials" field is an array, you can add multiple endpoint configurations.
+# Make sure that you *do not* hard code the "PAT" here. That is a sensitive information and must not be checked in.
+# ENV VSS_NUGET_EXTERNAL_FEED_ENDPOINTS {\"endpointCredentials\": [{\"endpoint\":\"${FEED_URL}\", \"username\":\"ArtifactsDocker\", \"password\":\"${PAT}\"}, {\"endpoint\":\"${GITHUB_FEED_URL}\", \"username\":\"${GITHUB_USER}\", \"password\":\"${GITHUB_PAT}\"}]}
+# RUN dotnet nuget add source ${FEED_URL} --name "myfeed" --username "whatever" --password="${PAT}" --store-password-in-clear-text --valid-authentication-types "basic"
+RUN dotnet nuget add source ${PACKAGETEST_FEED_URL} --name "myfeed_gitea" --username "${READ_NUGET_USER}}" --password="${READ_NUGET_PAT}}" --store-password-in-clear-text --valid-authentication-types "basic"
+
+WORKDIR /src
+COPY . .
+RUN dotnet restore "SimplePackage/SimplePackage.csproj" --runtime linux-x64
+WORKDIR "/SimplePackage"
+RUN dotnet build "SimplePackage.csproj" --no-restore -c Release -o /app /property:Version=${BuildVersion:-1.0.0-dev} --self-contained --runtime linux-x64
+
+FROM build AS publish
+ENV TZ=Europe/Berlin
+ENV LANG de_DE.UTF-8
+ENV LANGUAGE de_DE:de
+ENV LC_ALL de_DE.UTF-8
+ARG BuildVersion
+RUN dotnet publish "SimplePackage.csproj" --no-restore -c Release -o /app /property:Version=${BuildVersion:-1.0.0-dev} --self-contained --runtime linux-x64
+
+FROM mcr.microsoft.com/dotnet/runtime-deps:8.0-jammy-chiseled-extra AS final
+ENV TZ=Europe/Berlin
+ENV LANG de_DE.UTF-8
+ENV LANGUAGE de_DE:de
+ENV LC_ALL de_DE.UTF-8
+ENV ASPNETCORE_HTTP_PORTS=8080
+ENV ASPNETCORE_URLS=http://*:8080
+EXPOSE 8080
+WORKDIR /app
+COPY --from=publish /app .
+ENTRYPOINT ["./SimplePackage"]