Simplify devcontainer setup and resolve git line ending conflicts (#1637)

Author: bergmeister

.devcontainer/Dockerfile

@@ -1,31 +1,6 @@
-#-------------------------------------------------------------------------------------------------------------
 # Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
-#-------------------------------------------------------------------------------------------------------------
+# Licensed under the MIT License.
 
 FROM mcr.microsoft.com/dotnet/core/sdk:3.1.101
-
-# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
-# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
-# will be updated to match your local UID/GID (when using the dockerFile property).
-# See https://aka.ms/vscode-remote/containers/non-root-user for details.
-
-# Avoid warnings by switching to noninteractive
-ENV DEBIAN_FRONTEND=noninteractive
-
-# Configure apt and install packages
-RUN apt-get update \
-    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
-    #
-    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
-    && apt-get -y install git iproute2 procps apt-transport-https gnupg2 curl lsb-release \
-    #
-    # Clean up
-    && apt-get autoremove -y \
-    && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
 
-RUN pwsh -c Install-Module platyPS,Pester -Force
-
-# Switch back to dialog for any ad-hoc use of apt-get
-ENV DEBIAN_FRONTEND=dialog
+RUN pwsh --command Install-Module platyPS,Pester -Force

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf