Avoid adding warnings to stderr

Author: Chuxel

container-templates/docker-compose/.devcontainer/Dockerfile

@@ -11,8 +11,13 @@
 # Debian and Ubuntu based images are supported. Alpine images are not yet supported.
 FROM debian:9
 
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
 # Install git, process tools, lsb-release (common in install instructions for CLIs)
-RUN apt-get update && apt-get -y install git procps lsb-release
+RUN apt-get -y install git procps lsb-release
 
 # *****************************************************
 # * Add steps for installing needed dependencies here *
@@ -22,4 +27,5 @@ RUN apt-get update && apt-get -y install git procps lsb-release
 RUN apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog
 

container-templates/dockerfile/.devcontainer/Dockerfile

@@ -6,8 +6,13 @@
 # Debian and Ubuntu based images are supported. Alpine images are not yet supported.
 FROM debian:9
 
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
 # Install git, process tools, lsb-release (common in install instructions for CLIs)
-RUN apt-get update && apt-get -y install git procps lsb-release
+RUN apt-get -y install git procps lsb-release
 
 # *****************************************************
 # * Add steps for installing needed dependencies here *
@@ -17,4 +22,4 @@ RUN apt-get update && apt-get -y install git procps lsb-release
 RUN apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
-
+ENV DEBIAN_FRONTEND=dialog

containers/azure-cli/.devcontainer/Dockerfile

@@ -5,18 +5,25 @@
 
 FROM debian:9
 
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
 # Install git, process tools
-RUN apt-get update && apt-get -y install git procps
+RUN apt-get -y install git procps
 
 # Install the Azure CLI
 RUN apt-get install -y apt-transport-https curl gnupg2 lsb-release \
     && echo "deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/azure-cli.list \
-    && curl -L https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
+    && curl -sL https://packages.microsoft.com/keys/microsoft.asc | apt-key add - 2>/dev/null \
     && apt-get update \
     && apt-get install -y azure-cli
 
 # Clean up
 RUN apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog
+
 

containers/azure-terraform/.devcontainer/Dockerfile

@@ -6,9 +6,13 @@
 # Pick any base image, but if you select node, skip installing node. 😊
 FROM debian:9
 
-# Install git, required tools
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \
-	&& apt-get install -y \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
+# Install git, required tools
+RUN apt-get install -y \
             git \
             curl \
             procps \
@@ -17,26 +21,26 @@ RUN apt-get update \
             ca-certificates \
             gnupg-agent \
             software-properties-common \
-            lsb-release
+            lsb-release 2>&1
 
 # [Optional] Install Node.js for Azure Cloud Shell support 
 # Change the "lts/*" in the two lines below to pick a different version
-RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash \
+RUN curl -so- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash 2>&1 \
     && /bin/bash -c "source $HOME/.nvm/nvm.sh \
         && nvm install lts/* \
-        && nvm alias default lts/*"
+        && nvm alias default lts/*" 2>&1
 
 # [Optional] For local testing instead of cloud shell
 # Install Docker CE CLI. 
-RUN && curl -fsSL https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg | apt-key add - \
+RUN curl -fsSL https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg | apt-key add - 2>/dev/null \
     && add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') $(lsb_release -cs) stable" \
     && apt-get update \
     && apt-get install -y docker-ce-cli
 
 # [Optional] For local testing instead of cloud shell
 # Install the Azure CLI
-RUN  echo "deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/azure-cli.list \
-    && curl -L https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
+RUN echo "deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/azure-cli.list \
+    && curl -sL https://packages.microsoft.com/keys/microsoft.asc | apt-key add - 2>/dev/null \
     && apt-get update \
     && apt-get install -y azure-cli 
 
@@ -55,4 +59,5 @@ RUN mkdir -p /tmp/docker-downloads \
 # Clean up
 RUN apt-get autoremove -y \
     && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog

containers/debian-9-git/.devcontainer/Dockerfile

@@ -4,11 +4,16 @@
 #-----------------------------------------------------------------------------------------
 FROM debian:9
 
-# Install git, process tools
-RUN apt-get update && apt-get -y install git procps
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
+# Install git, process tools, lsb-release (common in install instructions for CLIs)
+RUN apt-get -y install git procps lsb-release
 
 # Clean up
 RUN apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
-
+ENV DEBIAN_FRONTEND=dialog

containers/ubuntu-18.04-git/.devcontainer/Dockerfile

@@ -4,11 +4,17 @@
 #-----------------------------------------------------------------------------------------
 FROM ubuntu:bionic
 
-# Install git, process tools
-RUN apt-get update && apt-get -y install git procps
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
+# Install git, process tools, lsb-release (common in install instructions for CLIs)
+RUN apt-get -y install git procps lsb-release
 
 # Clean up
 RUN apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog