Created improved DevContainer using vscode

.devcontainer/Dockerfile

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+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.183.0/containers/ubuntu/.devcontainer/base.Dockerfile
+
+# [Choice] Ubuntu version: bionic, focal
+ARG VARIANT="focal"
+FROM mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
+LABEL name="nvm-dev-conteriner"
+LABEL version="latest"
+
+# Set the SHELL to bash with pipefail option
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+# Prevent dialog during apt install
+ENV DEBIAN_FRONTEND noninteractive
+
+# ShellCheck version
+ENV SHELLCHECK_VERSION=0.7.0
+
+# Install apt packages
+RUN apt-get update         && \
+    apt-get upgrade -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"  && \
+    apt-get install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"     \
+        coreutils             \
+        util-linux            \
+        bsdutils              \
+        file                  \
+        openssl               \
+        libssl-dev            \
+        locales               \
+        ca-certificates       \
+        ssh                   \
+        wget                  \
+        patch                 \
+        sudo                  \
+        htop                  \
+        dstat                 \
+        vim                   \
+        tmux                  \
+        curl                  \
+        git                   \
+        jq                    \
+        zsh                   \
+        ksh                   \
+        gcc                   \
+        g++                   \
+        xz-utils              \
+        build-essential       \
+        bash-completion       && \
+    apt-get clean
+
+RUN wget https://github.com/koalaman/shellcheck/releases/download/v$SHELLCHECK_VERSION/shellcheck-v$SHELLCHECK_VERSION.linux.x86_64.tar.xz -O- | \
+    tar xJvf - shellcheck-v$SHELLCHECK_VERSION/shellcheck          && \
+    mv shellcheck-v$SHELLCHECK_VERSION/shellcheck /bin             && \
+    rmdir shellcheck-v$SHELLCHECK_VERSION
+
+# Set locale
+# Add user "nvm" as non-root user
+# Set sudoer for "nvm"
+RUN locale-gen en_US.UTF-8 \
+    && useradd -ms /bin/bash nvm \
+    && echo 'nvm ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+
+# Switch to user "nvm" from now
+USER nvm
+
+# # nvm
+# RUN echo 'export NVM_DIR="\Workspace"' >> "$HOME/.bashrc"
+# RUN echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm' >> "$HOME/.bashrc"
+# RUN echo '[ -s "$NVM_DIR/bash_completion" ] && . "$NVM_DIR/bash_completion" # This loads nvm bash_completion' >> "$HOME/.bashrc"
+
+# # nodejs and tools
+# RUN bash -c 'source $NVM_DIR/nvm.sh && \
+#     nvm install node && \
+#     npm install -g doctoc urchin eclint dockerfile_lint && \
+#     npm install --prefix "$HOME/.nvm/"'

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.183.0/containers/ubuntu
+{
+	"name": "Ubuntu",
+	"build": {
+		"dockerfile": "Dockerfile",
+		// Update 'VARIANT' to pick an Ubuntu version: focal, bionic
+		"args": { "VARIANT": "bionic" }
+	},
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {},
+
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [],
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "bash /workspaces/nvm/.devcontainer/postCreation.sh",
+
+	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "nvm"
+}

.devcontainer/postCreation.sh

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+# # nvm
+
+NVM_DIR="/workspaces/nvm"
+echo 'export ${NVM_DIR}' >> "${HOME}/.bashrc"
+echo '[ -s "${NVM_DIR}/nvm.sh" ] && . "${NVM_DIR}/nvm.sh"  # This loads nvm' >> "${HOME}/.bashrc"
+echo '[ -s "${NVM_DIR}/bash_completion" ] && . "${NVM_DIR}/bash_completion" # This loads nvm bash_completion' >> "${HOME}/.bashrc"
+
+# nodejs and tools
+source ${NVM_DIR}/nvm.sh
+nvm install node
+npm install -g doctoc urchin eclint dockerfile_lint
+npm install --prefix "${NVM_DIR}"
+
+echo hi >> $NVM_DIR/test