moved front end to the end where it should be

Author: krystan

containers/typescript-node-8/.devcontainer/Dockerfile

@@ -7,7 +7,6 @@ FROM node:8
 
 # Configure apt
 ENV DEBIAN_FRONTEND=noninteractive
-ENV DEBIAN_FRONTEND=dialog
 ENV SHELL /bin/bash
 
 RUN apt-get update \
@@ -24,4 +23,6 @@ RUN apt-get update \
     && npm install -g tslint typescript \
     && apt-get autoremove -y \
     && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
+
+ENV DEBIAN_FRONTEND=dialog