update devcontainer

.devcontainer/Dockerfile

@@ -1,47 +1,9 @@
-#-------------------------------------------------------------------------------------------------------------
-# Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
-#-------------------------------------------------------------------------------------------------------------
-
-FROM rust:1.47
-
-# 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.
-ARG USERNAME=vscode
-ARG USER_UID=1000
-ARG USER_GID=$USER_UID
+FROM mcr.microsoft.com/vscode/devcontainers/rust:1
 
 # 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, needed tools installed
-    && apt-get -y install git openssh-client less iproute2 procps lsb-release \
-    #
-    # Install lldb, vadimcn.vscode-lldb VSCode extension dependencies
-    && apt-get install -y lldb python3-minimal libpython3.7 \
-    #
-    # Install Rust components
-    && rustup update 2>&1 \
-    && rustup component add rls rust-analysis rust-src rustfmt clippy 2>&1 \
-    #
-    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
-    && groupadd --gid $USER_GID $USERNAME \
-    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
-    # [Optional] Add sudo support for the non-root user
-    && apt-get install -y sudo \
-    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME\
-    && chmod 0440 /etc/sudoers.d/$USERNAME \
-    #
-    # Clean up
-    && apt-get autoremove -y \
-    && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
+RUN rustup update 2>&1 \
+    && rustup component add rls rust-analysis rust-src rustfmt clippy 2>&1
 
 # Switch back to dialog for any ad-hoc use of apt-get
 ENV DEBIAN_FRONTEND=dialog

.devcontainer/devcontainer.json

@@ -6,7 +6,10 @@
   "settings": {
     "terminal.integrated.shell.linux": "/bin/bash",
     "lldb.executable": "/usr/bin/lldb",
-    "rust-analyzer.updates.askBeforeDownload": false
+    "rust-analyzer.updates.askBeforeDownload": false,
+    "files.watcherExclude": {
+			"**/target/**": true
+		}
   },
   // Add the IDs of extensions you want installed when the container is created.
   "extensions": [