Visual Studio Code Remote Containerでロケールを設定する

{
    // For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
    // https://github.com/microsoft/vscode-dev-containers/tree/v0.112.0/containers/typescript-node-12
    "name": "Vue CLI & Node.js 14",
    "dockerFile": "Dockerfile",

    // Set *default* container specific settings.json values on container create.
    "settings": {
        "files.trimTrailingWhitespace": true,
        "editor.formatOnSave": true,
        "editor.codeActionsOnSave": {
            "source.fixAll.eslint": true
        },
    },

    // Add the IDs of extensions you want installed when the container is created.
    "extensions": [
        "octref.vetur",
        "dariofuzinato.vue-peek"
    ],

    // Use 'forwardPorts' to make a list of ports inside the container available locally.
    "forwardPorts": [
        8080,
    ],

    // Use 'postCreateCommand' to run commands after the container is created.
    // "postCreateCommand": "npm install",

    // Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
    // "remoteUser": "node"
}

#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------

# To fully customize the contents of this image, use the following Dockerfile instead:
# https://github.com/microsoft/vscode-dev-containers/tree/v0.112.0/containers/typescript-node-12/.devcontainer/Dockerfile
FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:14

# Set locale
RUN apt-get install -y locales \
    && sed -i '/^#.* ja_JP.UTF-8 /s/^#//' /etc/locale.gen \
    && locale-gen \
    && ln -fs /usr/share/zoneinfo/Asia/Tokyo /etc/localtime\
    && dpkg-reconfigure -f noninteractive tzdata
ENV LANG="ja_JP.UTF-8"
ENV LANGUAGE="ja_JP:ja"
ENV LC_ALL="ja_JP.UTF-8"

RUN npm install -g @vue/cli

root ➜ /workspaces/hoge (master ✗) $ date
2022年  1月  5日 水曜日 22:21:05 JST