Update final 2019 image names

1-chocolatey/Dockerfile

-FROM mcr.microsoft.com/windowsservercore-insider:10.0.17744.1001
+FROM mcr.microsoft.com/windows/servercore:ltsc2019
 
 RUN powershell iex(iwr -useb https://chocolatey.org/install.ps1)

2-node/runtime/Dockerfile

+FROM mcr.microsoft.com/windows/nanoserver:1809
+ADD https://nodejs.org/dist/v10.11.0/win-x64/node.exe C:/Windows/system32/node.exe
+USER ContainerAdministrator
+CMD [ "node.exe" ]

4-portainer/Dockerfile

-FROM mcr.microsoft.com/nanoserver-insider:10.0.17744.1001 AS download
+FROM mcr.microsoft.com/windows/nanoserver:1809 AS download
 ENV PORTAINER_VERSION 1.19.2
 WORKDIR /tmp
 RUN curl -Lo portainer.tar.gz https://github.com/portainer/portainer/releases/download/%PORTAINER_VERSION%/portainer-%PORTAINER_VERSION%-windows-amd64.tar.gz
 RUN tar xzf portainer.tar.gz
 
-FROM mcr.microsoft.com/nanoserver-insider:10.0.17744.1001
+FROM mcr.microsoft.com/windows/nanoserver:1809
 COPY --from=download /tmp/portainer /
 EXPOSE 9000
 USER ContainerAdministrator